Congratulations gents! The only advice I will give out is to not buy/bring a bunch of shit down with you. You will get most everything you need to successfully complete OCS at the large/small bag issue. I read all the gouge from years past, went to walmart and bought a bunch of shit, only to have to buy it again there. The only things I found it nice to have extra of were small ziplock bags, pens and mechanical pencils, and a small rite-in-the rain. There were a few other things, but you will figure out what those are along the way. You can definitely get through to the first libo and then get whatever you need at the MCX. One last thing. Cash. Somewhere I had seen to bring $100 or so in small bills, $5's & $1's. DO THIS. It makes paying for your weekly haircuts much easier. I just kept a bank envelope with all the cash in the back of my wall locker on the top shelf.
Now, go PT celebrate! But seriously, be a PT stud, your life will be much easier.