Have put Toyo on a 36ft DP, two Jeeps, and Mustang GT.
For the ride, performance and mileage they have all been great.
I also have a 30ft Class C now and when time to look comes will see if Nokian makes a tire that will work. They are made in Finland and I have just put a set on Honda CRV.
Rate right up there with top of the line tires and yet price is significantly less. They ride great, very very quiet, handle well in the rain. Figure Finland should know how to make a tire for the Northwest. :)
Don't know if they make anything to fit the Class C but will be looking and comparing.