I bought a 55 gallon food grade barrel for $20, screwed in a regular outdoor type faucet in one of the threaded holes, I attach a washing machine hose, double female, to the faucet and then to my water hose to fill the barrel. When I'm ready to fill my camper I have a portable water pump, use the same washing machine hose to hook the input side of the pump to the threaded faucet run another hose to my camper, turn on the pump and pump it in. You can get the pumps in either AC or DC. Mine is AC since I have a generator. If it is DC just make a plug to plug into your trailer outlet at the back of your truck.I keep the barrel in the back of my truck, forward of my 5th wheel hitch.