I keep mileage records an note a lot of what else I do tot he coach in the same spreadsheet. I do it as much as an exercise as for any other reason. My reason for owning a MH certainly wasn't MPG. Our daughter was about 10 and we figured if we didn't do it then, we'd probably not do it til after she was all grown up. For the cost of the rig we could have taken some pretty high end trips, but I am pretty sure that the Ritz as accommodating as they are wouldn't take kindly to starting a fire and making smores outside our room!