Bad idea.

If you go home for every holiday, you can actually manage to go home about every two months. If you only go home for the big holidays, that's still only 4 months away, which, given how occupied you'll be during that time, wont seem like very long, and given how many people you'll be living around, you're not likely to get lonely, unless you're not a very social person, in which case living in a dorm might not be for you.

It's going to suck for many reasons. Stress, social hinderance, and living peacefully with your roommate.

If you get caught, the consequences will be bad for you, and probably bad for the snake as well.

After doing the dorm thing for a year, most people decide they've had enough and do everything they can to get their own place for the next year. Maybe cut out the middle-step and just find your own place. Most landlords I've dealt with are fine with snakes.