I have a similar set up ... I bought a food grade plastic barrel, built up a PVC replacement bung with a water facet installed so a hose could be connected. The other bung, I drilled a hole and installed a stainless steel tire valve stem. I stand the barrel up in the truck and fill at home, then transport to the lease, lay the barrel down in the bed of the truck with facet towards the tail gate, attach a garden hose to the faucet, open the facet, then use a 12Vdc air compressor to apply a little bit of pressure thru the valve stem to pressurize the barrel to help the flow rate. It takes 5-10 minutes to offload 55 gallons of water into the holding tank of the RV ...
The barrel is easy to maneuver by one person and easy to store when not in use.
"everyone that lives dies but not everyone who dies lived..."