Planning trip, Colorado and Wyoming then back to ohio

[bronson]

Heading to a teachers seminar in Laramie wyoming in late June.  Plan is to drive bus out with toad attend seminar leaving bus somewhere and fly home. My son and I will fly back mid July to attend skilled trades summer camp in sunrise wyoming. Wife and daughter will come join us at end of camp. Camp ends right before frontier days in cheyenne so we plan on that. After that we are up for anything. Thought about Grand Tetons (did it as a kid in 80's) but hearing reservations will be needed way in advance for camping. Any boodocking accessible for mci 9? Sites to see or avoid? Really don't need to see crowds of yellowstone or grand Teton if over run by tourists. May do Colorado or New Mexico, route 66 on way back to Ohio. Thanks in advance