There is also WW at home, for $100 or $120 for the deluxe kit you get program materials
http://www.weightwatchers.com/plan/hom/package.aspx it also says on WW that online members can buy starter kits, but I couldn't find what was in them.
Good luck, to you. I find that having the camper (motorhome in your case) actually helps me stay on program, just like the house, I don't stock it with alot of junk and having the kitchen to prepare your own stuff is so much better than eating out every meal.