Apart from the flatmates and and clubbing, is there another reason you're worried? I'm also moving into uni dorms for the first time on Saturday but picked a studio just to avoid the whole sharing thing. If you're worried about bringing too much then you could try only bringing essentials like clothes? Those you're sharing with might be bringing things for the kitchen so if you're planning to bring stuff like that then you could maybe see what your flatmates have brought then buy accordingly once there?