You should take this with a grain of salt, since I know nothing about York specifically, but...
The only way you'll know if you, a "Liberal-minded poet/musician English/ Creative writing major" will fit in there is to investigate the English Department, Music Department, and the campus itself-- since this is your year to travel all over and visit all those places you might attend, give them a shot...
Websites and college survey books are good for a first look, but you can't know how you'll react to the place without getting a "feel" for it yourself. It's like trying to find an apartment in a new city-- you can pick up the rental listings in the newspaper, but if you go to a place and are uncomfortable with the neighborhood, then it's not for you. Never select sight unseen...