<p>It depends on how many companies you wish to approach. The SEC (Student Engineers’ Council) who puts on the career fair always posts on their website which companies are coming, and when. I’d see which/how many companies you want to talk to, and probably double that number for the amount of resumes to bring. This way you account for companies you visit that you didn’t originally plan for, as well as the companies that ask for more than one resume (which does happen). It’s always better to have too many resumes than not enough.</p>