Summer Start at Clemson

Can someone give me some more information on the summer start at Clemson? Clemson is my number 1, but I have several conflicts during the summer that would impede my studies at Clemson in the summer. Is there any way I can switch to Summer I (May 5 - June 21) instead of Summer II (June 26 - August 5) session? Also, how many students are in this? And has anyone heard anything from other students who have done it before? Thanks!

I know someone accepted to this, but their HS gets out only days before the June 26 start!
When offering this, Clemson Admissions should really consider when the HS graduation date is. All kids need a break after HS. Now this person has to literally move the day after graduation (OOS).

I was also offered the TTSB program and it is honestly ridiculous how they can expect students to spend their entire summer at the school. I would call their undergraduate admissions and talk to them about it.