Bring the bike no matter what...if you use it more power to you. If you don't, you can always sell it and get a better one via Craigslist or bike kitchen, etc. I am SO glad I decided to get a bike this year as I am in summer school and it helps me get around campus efficiently. YES there are hills but it gets your heart pumping and alert for class
they aren't that bad, unless you're biking up to the arboretum or from highland to the residence halls. there are a lot of paths and shortcuts that you'll find to get from place to place once you familiarize yourself.