I highly recommend you listen to those who have gone before you. We've all been there, done that - the less you have on you the better off you'll be.
Bring your ID card and what ever required paperwork they've told you to bring, the clothes on your back, zip-lock baggie for cell phone & cell phone charger (suggest you put name/rank company and platoon number on ziplock baggie or at least have something ready w/ that info so you can quickly put it on the bag b/c you'll be shoved thru the human assembly line). Bible yes (or have mom/dad mail it on I-day from in town) - I know they issue you one, but I know that I wanted my own personal Bible b/c I have it maked up w/ notes and such (obviously your choice).
You literally will be issued all your gear on I-day and fitted for stuff that requires tailoring. by the end of it your seabag will weigh about 70lbs at a min. and then add any personal items you still have on you at the time. you don't get time to nicely pack your seabag either so as you are shoved thru the assembly line you just throw stuff in your bag and it's unbalanced and everything and not fun to haul around. Then you'll arrive to your lovely living arrangements for the nexts 6wks to find some nicely stacked boxes that say "Plebe Issue Gear Box #1, 2, 3...etc" (at least that's what they said on mine). In these boxes you'll find MORE STUFF...
again, take our word for it - the less you have the better off you are - not to mention when it comes time to move all your stuff when the Brigade returns the less you have the easier/quicker it is to move as well
Remember your 7 Ps: Prior Proper Planning Prevents Piss Poor Performance