FMCA has a program called the Michelin Advantage. The program covers all Michelin tires from passenger car sizes up the the 22.5 Class A tires. The money you save will more than save the membership dues.
When I bought six 22.5 tires for my Class A, I saved about $100.00 per tire. You buy the tires directly from Michelin who will then ship them to a dealer near you. You pay Michelin directly (by credit card) and pay the dealer to mount and balance the tires. On my Class A, I used Dyna Beads to balance the front tires.
Now, that I have a Class C, I will still use the Michelin Advantage program to buy my tires when they "age out".