Every Company and every platoon is different. If I recall correctly, your free time doesn't start for awhile. You absolutely CANNOT sleep during that time. Sleep is a privelege in boot camp!
After a loooong time, we were allowed to shower during free time, but I beleive that was only on Sundays. And VERY close to the end. You will find that such little things as washing your hair or shaving your legs become a serious treat while you are there, I wouldn't expect too much out of your free time. Often it is shortened, and you are given other things to take care of.
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"You can't buy candy cigarettes anymore, but you can still get Pixie Sticks...what kind of message does that send? 'Son, you can't have candy cigarettes, they might make you want to smoke--but go ahead and do powder through a straw' "--Larry The Cable Guy