I don't know about DCCC but for college in general...
Check if your dorms will have AC - if not, BRING LOTS OF FANS. I ended up having like, 3 in my room because the first 4 weeks at school were BRUTAL (hot summer + living on the top floor of a really old building)
I used this website a lot (and the app) when I was making my various lists of packing stuff. It's pretty comprehensive. College Packing List - Your College Checklist
Also - assuming you find out who your roommate is ahead of time, collaborate with them so you don't end up with 2 of everything (dorms are small, so it's best to divide and conquer and save space. ALSO, lots of storage things)