There was one in a Monaco we rented a few years back and it struck me more as a de-humidfier than an actual dryer. Maybe it was just the one in that particular unit........

Our Marathon was ordered without a washer/dryer. I was headed full throttle towards installing a stacked unit before we took delivery, but Steve B. talked me out of it and we don't miss it. The extra closet space is very nice to have. Sure there are occasions, but on long trips we (ok she) just go do laundry when needed.

(BTW, you are welcome for this totally useless contribution to helping solve your problem.)