Good job on getting accepted. St Jean is a nice little place the Mega (cflrs) is huge, you guys will more than likely be posted to the green sector and on a nice floor with tons of stairs to climb (wait till you climb them with your ruck and duffle bag after returning from farnham
) finding your way around there is confusing at first you will probaby get lost on the way to the mess a few times but you will learn it pretty quick. As for the dress there, they say no jeans and what not but everyone wears them around just don't bring any ripped ones.
You will be confined to base for the first 4 weeks with probably little or no access to the canex so make sure you bring the essentials with you, they will let you go get some small stuff like boot bands, shoe shine kit, locks etc.. but not much stuff, the thing I noticed was alot of people were running out of laundry soap so maybe bring some more of that if you have the room. Also those mr. clean magic erasers are like gold! they take polish right off the floor instantly.. trust me before inspection when you notice a large black mark you have just made they will be worth every penny!
A couple more tips for you guys.. Wear your parade boots!!! to break them in, and polish both pairs with alot of brush shine coats. If you don't you will regret it later on when you have to start spin shining them and they are cracking and flaking all over the place. If you do this right at the beginning it will save you TONS of time later on when you need it more.
Make sure your security checks are good, lock up your locker (both doors!) and your barrack box. Don't be sneaky and try and hide your key somwhere like under your fan or lamp or put your locker combination sticker there. The staff know all these tricks. If you forget to lock your locker you will probably get a counselling, possibly fire picket and worse yet if your weapon is in there you can be recoursed or even charged (1st time usually note to file, 2nd P.O failure, 3rd PRB..recourse)
Last thing, if you need something badly from the canex look for someone with an 'A' for their rank thats a PAT platoon member and they have canex privaledges so you might just be able to work out a deal with them.