The 'Visit Cambridge' web site has a comprehensive listing of local accomodation.
Rooms are available at Clare College at the following rates:
Rooms will be held until the end of January, so book now by emailing Heidi Hume (icome6-accom@english.cam.ac.uk) for further information.
Further information about accomodation forthcoming.
Much of the Cambridge City Centre is closed to non-pedestrians. The Cambridge City Council web site section entitled 'Travelling into Cambridge City Centre' states: "Travelling into Cambridge City Centre by car is not recommended if you can avoid it..." and offers alternative suggestions.
If you do drive into Cambridge, the following may be useful:
Breakdown services and car and van hire in Cambridge