I am currrently at the college and living in Boscombe, walking distance from the beach, shops and a cheap pub. There are so many people that drive in from the area I am sure for a small bung a week you will easily find carshare.
I wouldn't worry about it too much, you can probably find car share on here or wait unil the induction course and find out whos living near you (also a good way to meet everyone)
