One full week into our 15-day boondocking challenge at Dupuis Campground in Central Florida, and we'd reached the point where the tank monitor became the most-watched screen in the RV. This episode is about the question every boondocker eventually asks: when the fresh water gauge says empty, how much water is actually left? We decided to stop guessing and measure it.
Watch the full video on YouTube to see the whole experiment.
The bucket test
RV tank sensors are famous for lying, and ours are no exception. So when the fresh tank read empty, we opened the low-point drain and caught what came out in collapsible buckets, one after another, until the tank was actually dry. The answer surprised us: "empty" on the monitor still meant multiple gallons in the tank. That's not nothing when you're rationing. Knowing your real reserve changes how you plan the last few days of a trip, and the only way to learn it is to run the test once yourself.
Siphoning it back in
Of course, having drained perfectly good water into buckets, we then had to get it back into the tank, which turned into its own experiment with the siphon method. Gravity, a hose, some sputtering, and a lot of coaching each other later, most of the water made it home. It was clumsy, it worked, and it taught us how we'd refill from jugs or buckets if we ever needed to stretch a stay without moving the rig.
Tire pressure and a stubborn gadget
With a travel day coming, we checked tire pressure using a new inflator gadget that fought us the whole way. Getting accurate cold-tire readings on a heavy fifth wheel matters too much to skip, so we wrestled with it until the numbers made sense. The lesson we keep re-learning: test new gear at home, because every tool has a personality and you don't want to meet it for the first time when you're behind schedule.
Tanks, solar, and a blimp
The end-of-week audit came out better than expected. Gray and black tanks had room, the batteries were healthy, and the solar had carried us through a week of real use: two people working full time, cooking every meal, living normally. While packing up, Nathan spotted the Goodyear blimp overhead, which counts as a wildlife sighting when you've been at the same campsite for seven days.
Packing up without the drama
Our gooseneck hitch connected on the first try this time, which deserves mention because early on, hitching was a whole event with hand signals and retries. Watching our pack-up process get faster is one of the most satisfying parts of these first months. Every travel day we forget fewer things, argue less, and roll out sooner. Week one of the challenge is done, the tanks are managed, and we now know exactly what our rig means when it says empty.
Watch the bucket test, the siphon experiment, and the pack-up on YouTube. We also send a short weekly newsletter about where we are and what broke this week. The signup form is on our newsletter page.