A lot of what 2muchpain said was true for me. Up at 7, lights out at 10:00. I had my own room but some people shared. I got lucky when I checked in. We didn't spend much time in our rooms anyway. Pretty full day of meetings and sessions.
I did eat three regular meals a day and put on weight because I didn't eat when drinking.
Bring at least two pairs of shoes with you. I got tired of wearing the same ones every day and it got uncomfortable.
You may want to consider bringing a little spending money if they have vending machine. For soda or snacks. But don't bring much and don't bring any valuables.