I really weighed the issue of a washer/dryer and I'm very sad as well that there's non on the Ollie, but...
What I do to avoid campground washers (for me, it's due to fragrance allergies, bad ones), is keep a large beer brewing pot in the back of my truck in which I wash clothes as a I drive. I fill it with water and detergent, drive for a while, dump the water and put in fresh, then hang clothes to dry. I used weatherstripping and clamps to keep the water from sloshing out and making a mess. Works very well. Still want a dryer, as I'm limited to certain weather conditions to dry clothes. Perhaps I'll try a small dehumidifier and hang system in the bathroom in the future.