We're going camping this weekend with ours. We got a full bottle when we bought the camper earlier this year, and I just checked it this morning and it's got a hair less than 2 gallons left in it. Since it's going to be a cold weekend at nights here (down in the 30s) I'm going to fill it up tomorrow before we leave town. We've several camps on it...1 night stay, 2 night stay (used the furnace one night since it was chilly), a 3 nighter, and two 6 night stays. All of those save for the one were without furnace. We did use our oven to cook brownies twice, and I made the boneheaded mistake of driving 2 hours with an oven burner turned on.
EDIT: Oh yeah, there were a couple days in between there where we used the LP to power the fridge while we were en route to Disney World as well.