Denali RV Park?

I, too, recommend Riley Creek inside the park. However, if you have a Class A, you should definitely reserve a site because Riley Creek has few spots long enough for an A. I believe there were only 20 sites out of 100+ that were long enough for a Class A. Also, Riley Creek has 3 loops--try the first loop as the road is finished and closer to the mercantile/showers. Also, the shuttle bus stops right at the mercantile and is convenient to the first loop.