Can't believe that I didn't think of this sooner. The main reason we bought our first RV in the first place was that at our local Hobie fleet sailing venue, there is nothing but a field and the beach. Most regattas we've attended have been very similar. So, the bathroom and shower were extremely critical in our decision making process.

Our first RV was a $4200 1978 Winnebago. Not much to look at, but everything worked, and we took it to a LOT of regattas.

Our current RV is a 1993 Fleetwood Tioga Arrow, Ford Econoline E350, with a 460-ish gas engine. Gets 7-7.5 mpg no matter how I drive, although it usually gets over 65 with no effort on flat roads (good luck finding those up here). The "hills" here will drop you to 40 MPH if you try to keep from downshifting, and the strain on the engine and tranny isn't a good idea.

Towing cats has never made any difference behind either RV (in terms of MPG), even when double stacked. All the drag is in the front of the RV, and the added weight doesn't seem to matter.

Mike