The Camco Rhino is a 36-gallon portable waste tank on no-flat wheels. You fill it from your RV's tanks, tow it to the dump station with your truck, and come back, all while the rig stays parked, leveled, and connected. After a steep first session and every boondocking stay since, our verdict is simple: if you park anywhere without a sewer connection for more than a week, this tote earns its keep fast.
Some links on this page are affiliate links. As Amazon Associates we earn from qualifying purchases, at no extra cost to you. We only recommend gear we actually own and use.
Why we bought it
We live full-time in a Brinkley Model Z 3515, and our favorite stays are the ones without hookups: family property, moochdocking driveways, boondocking spots we would happily hold onto for weeks. The problem is that gray and black tanks fill up on their own schedule no matter how nice the view is. Without a tote, a full tank means breaking camp, hitching a 40-foot fifth wheel, towing it to a dump station, and setting everything up again. That is hours of work to empty a tank.
The Rhino was our answer. Thirty-six gallons is enough to take a real bite out of our tanks in one trip, it has a built-in gate valve so nothing escapes on the drive, and the steel tow adapter hooks straight to the truck hitch so nobody has to drag it by hand.
How we use it
Our first real session with the tote came two weeks into a moochdocking stay in Michigan, when the tanks hit full and we finally unboxed the gear we had been hauling around the country like expensive ballast. We filmed the whole thing, mistakes included, in our tank dumping episode. We started with the kitchen gray tank as a warmup, moved on to black, and learned in real time why the side fill port and proper venting matter. If air cannot escape the tote while liquid comes in, the flow chokes, and you stand there wondering why nothing is happening.
The other half of our setup is a 12V portable macerator pump, which grinds waste and pushes it through a small hose instead of relying on gravity. With a fifth wheel, gravity is rarely on your side, so the macerator is what makes the tote practical for us. Once the tote is full, we hook the tow adapter to the truck and drive it to the dump station at walking speed while the rig stays put.
That first session took us the better part of a day. Now that the workflow is dialed, it is a routine chore instead of an event.
What to know before buying
A few honest caveats from experience. Venting is the thing everyone fumbles first, us included. The Rhino tote tank gauge threads on like a garden hose fitting and lets the tank breathe while filling and dumping, and it fixes exactly the flow problem we fumbled through on camera. We consider it a must-have, not an extra.
Second, weight. Thirty-six gallons of black water is about 300 pounds, and the wheels are not interested in soft ground. Tow it with the truck; do not plan on pulling it by hand across grass.
Third, do not pair it with a hose you do not trust. Our cheap starter sewer hose leaked at the fitting during that first session, in a moment our video chapter list politely calls the Poopsie. We swapped to the RhinoEXTREME sewer hose kit and added a shut-off valve, and we have not had a leak since.
Finally, the tote lives outside between uses, so the sun works on it constantly. The Rhino nylon cover with its cinch strap and drain grommet keeps UV and weather from aging the plastic.
Where to get it
The Camco Rhino 36-gallon tote tank is on Amazon. If you are starting from scratch, add the gauge for venting, the cover for storage, and the macerator pump if your rig sits higher than the tote or you cannot count on gravity.
The tote is one piece of our full setup. The rest of what lives in our basement storage is in our RV sewer and tank gear roundup, and the bigger off-grid picture, water and power included, is in our boondocking setup and our SOK lithium batteries page.