many of my good friends in slc have gone to school in logan and i've been up there a fair amount.
there is climbing in logan canyon and i have enjoyed it every time i've been up there.
there is lots to do outdoors from floating rivers to hiking, and you aren't far from ID at all.
many of my friends initially met ridesharing to the beav. slc is a couple of hours away, might be tougher to find a ride there, but not impossible especially once you know a good amount of people.
there are a few places to have fun in logan, and there are a lot of fun people up there, but there is a large mormon presence in the cache valley from what i understand. however, that's utah. there is no use in worrying about stuff like that. make your own fun.
they all liked the school a lot, it's a nice campus too.
hope that helps even if it's a hodgepodge of weekend trips and secondhand info.