I really enjoyed the opportunity to learn about all the behind-the-scenes work that goes into making a college library run. Furthermore, I was given the opportunity to lead certain library projects. I was given plenty of time for independent exploration as well, and a good amount of mentorship.
What I wish was different
DCAD's library lacks some of the resources of larger, more well funded libraries. It's true that I would have liked the opportunity to work with some of these resources, I still found my overall experience very helpful.
My one piece of advice is probably that you shouldn't be afraid to get in contact with someone who you don't know and who isn't even offering an internship at the moment. You never know if they just haven't considered the possibility yet.