Well, I did similar training in the Army (basically, they gave us 3 hours to grab gear, and dropped us off in the middle of the woods alone for a week in the middle of the woods). Heres a list of stuff you'll find useful:
Military Canteen (Comes with 1qt canteen, and canteen cup)
4 MREs (These will contain all the food you would need for the entire time, + 1 day extra)
Para/550 cord (Trust me, you can't get enough of this stuff in a survival situtation, we used to wear "Paracord bracelets" which had a bunch of paracord woven into a bracelet for use)
Mo Tool Axe (Definatly worth it)
Cigarette Lighter (with spare fuel)
Pocket Mirror
Extra shirt/pants (and, you should try to get ACU, Advanced Combat Uniform, from a surplus store if you can. It will help you retain bodyheat and has more pockets than your body has room for. The ACU is an upgrade from the old Us Army BDU).
Poncho
Tri-Fold Shovel
2 boxes of babywipes (YOU WILL THANK ME FOR THIS LATER, both for cleaning up after doing your business, and cleaning yourself in the morning)
First-Aid Kid
You should have plenty of spare room, even with all that equipment for whatever else you might want to bring.
This is optional:
Military Compass (one which lets you shoot an azimuth)
Map of the area
Waterproof pencil
small notepad with waterproof paper
Note: If you don't know how to navigate, don't bother. And I mean, unless you went to a class and actually learned how to triangulate your position from shooting azimuths with a compass, and have done a step calculation ignore this stuff, because it won't help you. And if you do know how to navigate, REMEMBER TO COUNT.