There are actually a fair number of colleges that have either pet-friendly designated dorms, or who allow pets in the dorms/in their on-campus apartments. A quick Google search brought up some pretty big names- University of Northern Colorado, Caltech, MIT (although that mostly seems to be cats), University of Washington, and many smaller colleges. I didn't look specifically at the policies of any of them, but at a quick glance was able to note that some mostly seemed in favor of traditional pets, but not exotics, while one would let you have anything that fit in a 20 gallon tank. So when searching for a college, you might take that into consideration and see what options you can find that would allow snakes.