You invite some friends to ride along to the beach in your towed vehicle. Oops, you don't have enough room for all the stuff you need to take along plus the extra passengers. Does your towed vehicle have a receiver hitch? If so, you may be interested in this fold away tote box. It opens up into a full fledged storage box that rides behind your rear bumper.
The box is actually a canvas bag with waterproof lining. The bag is held up by a skeleton of aluminum pipes with copper fittings.
Fill it up with goodies then zip it shut.
Strap the cover in place and away you go.
When you're finished it folds away into a small package that will easily fit in the trunk. I saw this unit at Costco for $199.99. This portabale storage solution is meant for temporary use but might work well with your RV lifestyle. Jim Twamley, Professor of RVing
You invite some friends to ride along to the beach in your towed vehicle. Oops, you don't have enough room for all the stuff you need to take along plus the extra passengers. Does your towed vehicle have a receiver hitch? If so, you may be interested in this fold away tote box. It opens up into a full fledged storage box that rides behind your rear bumper. 
The box is actually a canvas bag with waterproof lining. The bag is held up by a skeleton of aluminum pipes with copper fittings.
Fill it up with goodies then zip it shut. 
Strap the cover in place and away you go. 
When you're finished it folds away into a small package that will easily fit in the trunk. I saw this unit at Costco for $199.99. This portabale storage solution is meant for temporary use but might work well with your RV lifestyle. Jim Twamley, Professor of RVing
Water the dogs, wash the rig, bail out the boat, keep your drinks on ice, put out the camp fire and then fold it up and store it under the seat of your car or truck. 
Look for them wherever Camco products are sold or order them online here