Well, I skate more than I bike and here is what I think. College Campus' can be a little tricky because there are so many people on the sidewalks and streets. If you do want to skate definitely get some skates with a heel brake and make sure you are comfortable stopping quickly. Even with that, though, you just can't stop as quickly as you can on a bike.

Rain is also a real drag for skating...much easier to deal with rain on a bike. Skate bearings, once they get wet will seize up if you don't take them out and lube them soon.

I'd go with the bike and mix in skating on dry days.