It's a busy time, Parents Weekend, and 150 miles is a long way.
Plan very carefully BEFORE you drag your new Cadet off too far, especially if s/he just wants to sleep and lounge in the hotel pool.
One thing we did in the the boys' 2* year: we went to Cheyenne Mountain Resort which is way out of our normal vacation genre (read: tent). It was so beautiful, and the food was wonderful and we still can't believe we paid $10 for a Coke (probably $12 now!).
Lots of area attractions are free for your cadet on PW. Call ahead and ask.