I never lived on campus while attending college. I resided with my family in Lawrence, MA and attended Merrimack College in North Andover, MA as a commuter. I didn't have to worry about nosy dorm mates or RA's snooping around and "accidentally finding" my knife in a shared room. As a commuter, I had a lot less to worry about and could easily explain the Gerber FS II that I EDC'd as a necessary tool for the part-time job that I had in a supermarket (opening boxes, etc.). Check to see if you are allowed to prepare meals in your dorm room or common area. Some colleges don't allow it because of the danger of fire. If your school doesn't allow it, then your "cooking knife" argument will not have much merit if you are accused of possessing weapons on campus.
Yes, we are allowed to prepare meals in the common area. I will keep all of my knives in a locked box when not in use, so I am not worried about anyone finding them. I'm only going to bring unintimidating looking knives as well, so as to avoid any trouble.