Not FT just yet, but have an all in one washer dryer since 2003 = love it for doing small item loads when we've been in CGs on FHU. Don't like that it creases everything so have to iron EVERYTHING, and that it doesn't hold much at all. We boondock a lot so we tend to have it going full steam on odd occasions we go into FHUs for dumping, replenishing tanks etc, and if just going to a dump station option will then find a laundromat to do couple of loads at once.
If you are going to be in CG's or with FHU's the majority of the time, I feel definitely worth having as it is your FT home, and I would go with a stacked washer dryer separate units not the all in one teeny load version. If you tend to dry camp/wild camp/boondock etc, then probably wouldn't bother, albeit we've come across some nasty things in an odd laundromat machine here and there during our years, but generally that's very rare.