Very overly ambitious itinerary. You'll be doing nothing but driving, making and breaking camp constantly, in a mad dash to hit the next attraction. That isn't my idea of fun. You either want quality or quantity, what's it going to be? It's your vacation. Relax and enjoy it, I say. That's my 2 cents.
Be sure to hit Mammoth in Yellowstone to hit the elk rut that time of year in September, but enjoy from a DISTANCE ONLY. For kicks, you can sit back and watch other people blatantly disregarding all the warnings they have repeatedly been given, approaching the bulls, camera in hand, trying their best to be "stealthy" and get that shot of a lifetime. YOU just might get lucky to get YOUR shot of a lifetime when those bulls have had enough of their intrusion.