i'm not sure what that ToC champ dude was talking about, but there is no need for blankets. it's fucking hot in the dorms...really hot. fan is a must, and by must i mean necessary for survival. you can bring sheets, but they provide some, and i didn't see any reason to prefer my own, but to each his own.
i wouldn't suggest bringing a printer, because people will just mooch off of you and then your lab leaders will find out and force you to bring it for the lab to use...don't bring one. just use one in the library or wherever.
power strip/surge protector: very, very useful. if you have a laptop. if not, no reason to care.
don't worry about the leatherman. bring it. don't stab someone with it and they won't care.
most important message: bring a damn fan.