Long trip, what did it cost?

We used very little on-board propane. We have electric heat, so we use that for the frosty nights. My wife did a small amount of cooking inside using propane, but I have three outside propane grills/stoves hooked to a ?25 pound propane supply. I do most of the cooking there. We don't get in a hurry. I make no advance reservations except for a destination - otherwise, we'll call an enroute park the day before we expect to get there. Seldom ever have a problem finding an open spot.