Most places that sell LP gas can fill it for you, but you have to go to them, they cannot bring it to you. We use Tractor Supply here, but most campgrounds have a propane fill station. If not there is usually one close by, and the campground can usually tell you where. If you do not leave the water heater on all the time, you will actually use very little. Furnace takes more, but down here you probably will not use it a lot. We always carry at least one small electric heater in the class A, and it usually keeps us plenty warm overnight. BTW, I usually fill the tank at the start of the season, and have had to go get gas only one time. That was the one time we stayed in a COLD climate through November and December of a VERY cold winter.
Noel and Betty Johnson (and Harry)2005 GulfStream Ultra Supreme, 1 Old grouch, 1 wonderful wife, and two silly poodles.