Rabb - Yea I didn't think they did selection boards that early, but who knows these days.
Nozeman - if you are on scholarship at the time of the cruise, you can go on the cruise. If you start on scholarship for the Spring semester, you should have no problem getting to CORTRAMID. If you pick the scholarship up in the Spring to start in the Fall, you are not a "scholarship student" at the time of the cruise and therefore do not go on cruise. A large factor in that is probably being able to have Intro to NS under your belt so you have some idea of what you are doing when you get to the cruise...
I was on a 3.5 yr PNS scholarship, but my scholarship started in a Fall semester. When it came time for my first cruise, I was offered CORTRAMID or a regular 2/c cruise, but I was strongly encouraged to go on the 2/c cruise. Unless you have absolutely no idea what you want to do with the Navy, go on the 2/c cruise and not CORTRAMID.
Your 2/c cruise will give you the opportunity (more so than other cruises) to talk to the enlisted sailors (and get them to actually talk to you honeslty) and get an understanding of what their lives are like. These are the people you are supposed to lead as an officer, so it would help you out a great deal to be able to show up as an Ensign understanding the people under you. CORTRAMID is not designed for this, so if you skip your 2/c cruise you will miss out on some valuable training.