Hi, I actually don’t have any personal experience with college athletics and T1 (I tried rowing for 2 weeks and didn’t like the team dynamics)… BUT I have 2 resources that may be helpful!
Type 1 Diabetic Athletes facebook group - lots of smarty pants people on here who know a LOT about how to manage exercise as a diabetic - I realize your son may not be into facebook but you could check it out for him
We have a lot of people here who are experts at managing diabetes with high level athletic activities, btw. The present forum is a great source of peer info.