3 weeks for the trip and back and forth to Rhode Island? I think I'd stick to the basics as the Baloonfest and Grand Canyon will take up most of your time. Utah & Co are great and perhaps you can travel through on one of the legs.
I love all the place mentioned I am not sure it will all fit in a couple of weeks. The Ballonfest is nearly a week and trip to the South Rim is easily 4 -5 more days.
Regarding your motorcycling, is it for getting around or are you wanting to ride some of the challenging roads in the Rockies, like 550? Again, you might want to concentrate how you want to spend your time.