Goodyear Wrangler All-Terrain Adventure with Kevlar Review
I have these on our SUV and they have been a great All Terrane tire, that rides smoother than many highway tires.
Consumer Reports gave them a high rating.
They also cost a little less than the Michelins.
They come in Load Range E with an extra layer of Kevlar added. They should definitely be a consideration for a Class B.
Side note: The one problem with buying tires from Costco is you can't make an appointment for tire service like rotations, it's first come first serve.