Great idea Orion 42.. Will do when return. Wish I had heard of that before. I mounted a 4 foot 5" vinyl fence post vertically beside the ladder to store my capped sewer hose. The sewer connections, water hoses, grill, leveling blocks, extra parts (belts, wipers, hoses, and extra alternator*) and some propane cylinders and 1.2 gallon propane tank are in a 46" x 20" x 20" waterproof aluminum truck box on a custom elevated hitch mounted rack.
*Extra alternator..my mechanic suggested this due to the higher amperage output, He felt that would be the hardest part for us to come up with in the backwoods of Canada and Alaska. I bought a "take-off" from Elkhart Alernator and Starter Exchange for $140. This a "tested" surplus "new" alternator he buys in bulk from a local ambulance converter who uses an even larger one than the Chevrolet 3500 and 4500 Cab & Chassis used by the RV industry comes with. A Delco Re-manufactured alternator was priced to me at $255 + a core charge.