Yeah, you'll get active pay plus BAH if you qualified for it.
Unless something has changed, it's a 17 week course unless you are there for Christmas. In that case, it's 19 weeks, but you get to fly home (on your dime) for those 2 extra weeks. You can get weekend passes, but you still have to be back in your bay at night. Overnight passes are forbidden unless you get special leave for some type of family emergency. During the week, we were pretty much on our own once classes were over and we had final formation (around 1700). Bed check was 2200 and was either out on the CTA (lame) or standing in front of your bunk. On the weekends (Fri & Sat), we had bed check/recall formations at 2300 and then a recall formation at 1700 on Sundays.
Passes and privileges go away quickly if your platoon/company gets out of line, and you will never see them if you have failing PT or course scores.
Oh, and if you are married when you leave for training, just stay married. Don't go chasing the insanity that goes on at Ft. Sam and end up screwing up your life. Nothing you see there will be worth the trouble in the end. I watched several people lose their minds over worthless pursuits.