1) FMCA (love the rallys and the magazine)
2) Good Sams/Camping World - discounts at RV parks 10% - always pays for itself. We also ordered the new Pilot/Flying J card.
3) Passport America - 50% off (with restrictions) - always pays for itself. They also have a great mail forwarding service based in Crestview FL.
4) Our insurance carrier includes roadside assistance in our policy. They use CoachNet. Haven't had to use them yet - thank goodness!
5) America the Beautiful pass for seniors and disabled. 50% off at Corps of Engineers, National Forests and BLM campgrounds.
6) We also use the Walmart Discover card for use at Walmart Murphy USA fuel (diesel and gas). We have a short 33' Class A and can get into most of their stations. With the card we get 3 cents or 5 cents off fuel. We also get 1% cash back for all purchases.