I've always been of the opinion that you should "go away" for uni - so far that it's not convenient to pop home for a weekend mid-term.
However we have just moved (massive move) and ds1 (yr12) is showing a real partiality to Cambridge, for a variety of mostly very valid reasons, and he does have the aptitude and GCSE grades to potentially get in.
But it's only 20 miles away from our new house - takes 40-60 mins by car (that's Cambridge traffic for you), or 20 mins by train.
Is this too close?