I found it very easy. I just asked around my hall and there were loads of musicians to choose from. Then just book the practice room and get writing songs! We practiced twice a week, 3 hours at a time, and did a gig every month or so during term time. We recorded about 10 songs professionally over the course of the two years we were together.
It's a hell of a lot of fun, some of the best moments of my undergrad degree were on stage. It gets you lots of girls, and its pretty cool when you actually get genuine fans who know all the words to your songs and stage dive and mosh and stuff, and cheer when you start playing the opening riff to their favourite song. We were also the support act for the support act for Lostprophets one time, that was cool.
edit: you might want to see if your university's band soc has a musician finder facility. Most of them seem to have.