As above, do as much or as little work as you wish but it will reflect in the final results unless you are super brainy...
I stayed at Lanchester which was self-catered as the food at Mitchell was shocking (deep fired lasagne!)
I actually enjoyed Cranfield as we were a good bunch and going drinking at the social club however the odd night at the foam party in MK did us no arm...
Just enjoy it, work hard and party hard.
Good luck.