Boondocking Off Grid – Water Solutions

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Boondocking off grid is one of the most freeing ways to RV camp — but water is the one thing you cannot take for granted. Run out of gas and you’re stuck. Run out of water and the trip is over. Over years of off-grid camping, we’ve worked through just about every water solution out there — from hauling it in ourselves to filtering straight from a mountain stream. Here’s what actually works.

Carry Your Own Water: Plan Before You Leave

Your RV’s Fresh Water Holding Tank

Most RVs come with a fresh water holding tank. Ours holds 46 gallons, which lasts two people anywhere from four days to a week depending on how carefully we use it. If you’re running the shower at full blast and doing dishes freely, you’ll burn through it faster than you expect.

We always run a quality inline water filter on our fresh tank line. It improves taste noticeably and gives you a layer of protection against anything that crept in during the fill. Worth every penny for something so simple.

One tip: when boondocking off grid after a long drive, fill up close to your destination rather than at home. A full fresh tank adds serious weight and will hit your fuel economy harder than you want on a long haul.

Collapsible Water Containers

If your RV has a smaller tank — or you want a backup supply — a collapsible water container is the move. We’ve carried this one for years. When it’s empty it folds flat and takes up almost no space. When you’re near a fill point — a campground tap, a water station, a friend’s place — you top it off and you’re good to go.

For a one-to-three-day trip, one or two containers covers most needs without relying on your holding tank at all. It’s also smart to keep one on hand even when your tank is full — you’ll find a use for it.

Finding Water On-Site

Natural Water Sources

Finding a boondocking off grid spot near a natural water source is our personal favorite setup. A creek or river nearby takes the pressure off your tank completely and lets you camp longer without resupplying. Some of our best spots have been built around this — beautiful country you’d never find at a campground, with fresh water 50 yards away.

Be selective about what you pull from. You want moving water — a well-flowing stream or river that looks clear. Standing or slow-moving water carries significantly higher risk of parasites, bacteria, and animal waste runoff. Even clear moving water isn’t guaranteed safe to drink without treatment — always filter it before use.

When scouting spots on apps like FreeRoam or iOverlander, check whether a water source is nearby. Build your planning around it when you’re going out for more than a couple of days.

Collecting Rain Water

For extended off-grid stays, rain water collection works better than most people expect. You don’t need fancy gear — a tarp strung between trees with a low point aimed at a collection vessel is enough to gather serious volume during a good rain. We’ll get gallons in an hour when a storm rolls through.

Always filter rain water before drinking, especially if it’s been sitting open for any length of time. This is particularly important when boondocking off grid in areas with heavy tree cover or near livestock. Rain is clean when it falls, but whatever it touches on the way down — your tarp, tree branches, your RV roof — adds contamination. Run it through one of the filter options below before it touches your lips.

Filter and Purify: Your Options Ranked

Whether you’re pulling from a stream, a rain collection point, or a questionable campground tap, filtration is non-negotiable when boondocking off grid. Here are the options we’ve actually tested, from simplest to most capable — pick what matches your trip length and group size.

Water Purification Tablets

The most compact and affordable option on the list. Water purification tablets belong in every RV emergency kit even if you have better gear on board. Read the directions for whatever brand you grab — most require a 30-minute wait after adding them before the water is safe to drink. Typically two tablets treat one quart of water; a pack of 50 covers 25 quarts.

This is your last-resort backup, not your primary system. But it weighs almost nothing and takes up zero space. Keep them in your emergency kit and forget about them until you need them.

LifeStraw Personal Filter

We both carry a LifeStraw Personal Water Filter whenever we’re away from the RV — hiking, fishing, or just exploring. You pull it out, stick it directly into any water source, and drink through it like a straw. That’s the whole operation. It filters 99.999999% of bacteria and parasites with zero setup required.

It’s not a camp system — it won’t fill your holding tank or a large container. But for personal use on the move, nothing beats it. Fits in a jacket pocket, no batteries, no moving parts, no maintenance between uses.

LifeStraw Go — Filtered Water Bottle

The LifeStraw Go filtered water bottle puts the same filtration into a bottle you fill and drink from normally. Fill it from a stream, a rain collection point, or a tap you’re not sure about — the filter built into the straw handles the rest as you drink. We keep one in the truck cab year-round, camping or not.

Pressurized Jerry Can — Base Camp Volume

When you need more volume than a personal bottle can handle, a pressurized jerry can filter hits the sweet spot. The HydroBlu Pressurized Jerry Can Water Filter holds up to 4 gallons — enough for cooking, coffee, and drinking through a full day for two people without constantly refilling.

For larger groups or longer stays, step up to the LIFESAVER 5 Gallon Filtering Can. Originally designed for disaster relief, it’s heavy-duty proven gear that handles whatever you throw at it. The LIFESAVER Water Purifier is another strong option if you want a portable heavy-duty unit.

The Berkey — Best Water Quality at Camp

If you want the best-tasting water you’ve ever had at a campsite, get a Berkey water filter. We’ve had ours for years. You pour water in the top — from any source — and gravity pulls it through the filters. What comes out the other side tastes better than most bottled water. Not an exaggeration.

The filters last up to 10 years with proper cleaning. The upfront cost is real, but spread over a decade of use it’s nothing. This is what we use as our primary camp filter system when boondocking off grid for more than a night or two.

For RV use, the Travel Berkey is the right size. Compact enough to sit on an RV counter, large enough for two people through a full day on a single fill. This is what we use and what we’d recommend to anyone serious about off-grid water.

Which Setup Is Right for Your Trip?

Final Thoughts

Water is the one thing you cannot wing when you’re boondocking off grid. Get your system sorted before you leave — not after you’re out there watching the tank gauge drop. We run the Travel Berkey as our base system, carry personal LifeStraws on hikes, and keep purification tablets tucked in the emergency kit. That combination covers us from every angle no matter where we end up.

Got questions about what works best for your rig? Drop them in the comments or reach out to us directly — we’re happy to help you figure it out.

Want more off-grid essentials? Check out our guide to free boondocking resources and how to find the best spots anywhere in the country.