Tim, you coming to Pompey uni? Excellent choice! Would be more than happy to show you the best place to drive your Rib down here, I've just got a job teaching powerboating.
Pompey doesn't at the moment have a powerboating club (That i've found) but there is a Sub-Aqua club with a newish Rib, and the Sailing club (which I'm involved in) is about to place an order for an XS-Rib with a 60 on the back. They are quite friendly with a local sailing club and use their facilities and yard.
Which course are you planning on studying?