How long does the iPhone 4S battery last if the phone is off?

I'm going to a summer camp for 8 days and was wondering if i should take my iPhone with my cuz there might be nice stuff to take photos of etc. I wasn't planning on keeping it on almost at all, only when i need it. So does the battery hold?

. I use the iphone 4s too but it spend so much battery even i don't using it. If you take a pic/chat or somethings else at all the time i think it can stand in lest than 5 hours

2 days max if you have it airplane mode and not using it to play games or stuff like that. If you will be turning it off and on only when you want to take pix (not videos) then it will most probably last the 8 days your going. Have fun!