Can't help on the camping spots (as I've only used a pickup / -12 / tent on this road). Only recommendation that I'd have it to go slow. As MORSNOW indicated, there's limited "big" spots....maybe plan on 2 nights on the road? Dunno.
The Denali is, IMNSHO, the best of the road drives in Alaska for scenery and such. Of course, the Richardson down to Valdez is spectacular, the Haul Road can be very nice, and even the little old Parks (between Talkeetna and Clear) or the Glenn (between Palmer & Glennallen) offer some nice views, but for a road trip that is very do-able in summer, that is somewhat remote but not really, and that offers great vistas nearly everywhere, the Denali can't be beat.