Sorry to hi-jack a thread, but I thought I'd answer a couple of the questions currently open - I'm a 4th year chemistry student currently at York.
Gothai - Yes! You can move back in at the end of the Easter break with all your stuff, you're accommodation is essentially for term-time on 36 week lets, with a bit of wiggle-room at either end of the year.
Laura - I'm currently living in Constantine College, my housemates lived in Langwith and Goodricke last year and I've lived in (what is now) Derwent on Hes West, which are the really old rooms. I'm in one of the house-based flats in Constantine, with 12 people living in it (not the deluxe rooms, we lack a TV in the kitchen and aren't en-suite - I don't believe any of the en-suites have bathtubs, but I'm not 100% sure). I'd say it's pretty nice, the rooms are fairly standard, there's good storage (though the entire room is probably smaller than my 1st year room), nice desk space and lots of light. There's also a large central building called The Forum, used for socialising. Langwith and Goodricke are also fairly new (Langwith's only two years old [I think]) and are quite nice too. Langwith has The Glasshouse, which is the YUSU bar on Heslington East, though obviously anyone is welcome. Goodricke is probably closest to the Law School, but nowhere on the same campus is far (and even between campuses, it's only 10 minutes or so). As for Hes East being isolated, it's definitely quieter, but it's much improved than it was when I began, the university is bringing more things over to try to make it more even. I know law students who have spent three years and barely been onto Hes West, however. There's plenty going on within the colleges and although a lot of societies are based on Hes West, it's not far enough IMO to change your mind over.
Lizziehumphreys - Generally, yes. Most courses are based on one campus or another, many having their own departmental teaching rooms too. The English department is based in Derwent, there are lecture rooms within the buildings, though English lectures do tend to be spread around - so they vary from Wentworth, Vanburgh, Alcuin, Physics, James and Chemistry, but they're all based on that campus. Generally, a lecture course will be within a single room throughout all of it's lectures, or the room timetables will be similar from week to week, so it's easy to get used to and again - none of the buildings are very far from each other. Across campus is only 5-10 minutes and you won't have back to back lectures with massive distances between them.
Hope that helps!