Since we live in the area, we have not stayed in an RV park here, but if we did we would check out the Aztec RV Park, which I think accepts Class A only.
If your travels take you to the Denver area we recommend Chatfield State Park (where we stayed for two weeks last summer)... you can see the Front Range of the Rockies from your campsite, and there is room between the sites so you don't feel cramped....
