Yeah, you are right, let me add on..
Washing detergent - For washing your own clothes during confinement
period
Shampoo/shower gel/facial wash - Some si gi nah sure won't bring,
and borrow from you
Clothes peg - Hang clothes outside window, admin attire always kena
stun one
Hanger - Very important, stand by condition of your closet, must
hang 2 sets no.4
Extra toilet paper - If you want, the SAF issued ones very
thin
I can't remember much already.. Others feel free to add on..
By the way, if you want to wait until book out then alter uniform
too late already lah! 
for the
first 3 weeks you will cheong sua in your uniform leh..
The sergeant will arrange for fitting of uniform the moment you
receive your gear, will exchange with other guys if it doesn't
fit.
