I've been out for just over ten years now so I imagine boot camp will be a little different.
I went in when I was 23 years old so the PT was a bit of a problem because I was really out of shape. But, because I was older the head games didn't really bother me, I knew what they were and ignored them.
Like when you wake up, we used to have an instructor come through and tell us to put on our blouses, and when everyone had one arm through he we scream for us to put on our trousers. Most people wanted to finish putting on their blouse and he would flip out, run up to people, and scream at them about why they can't follow directions.
It didn't matter in what order we got dressed, we still had the same time to do it. Even if you did an arm, a leg, the other arm, the last leg. You still get there.
I also hated the 'games' that the DI's liked for us to play on the quarterdeck. It's not simply PT, you play games which seem like torture sometimes. But you get over it.
I have more advice for when you get out of boot camp.
Don't drink. Especially after boot camp. I got into quite a bit of trouble myself just luckily not something serious, like DWI, rape, assault, etc. While I was on Okinawa a couple of Marines apparently got drunk, raped a native girl, and ended up in a world of ****.
And if you are in Okinawa do not **** with the JP (Japenese Police). They are not only trained in several forms of martial arts they are also not bound by Miranda, etc.