Should i attach a cover letter to my resume at a career fair?

My college is having a career fair tomorrow and I've been told to get my resume ready. Thing is, idk if I should get a cover letter because I don't really know who to address it to. I'm a junior in engineering

tiffany2014-09-30T20:53:22Z

Cover letters should be created individually for each business you are applying to, but they are not expected at career fairs.