I'll just follow up on the same thing, really.
Boot camp is a joke, physically speaking. If you're of even average physical health, you'll do fine. And you should be able to pull an adequate PRT score as long as you maintain that adequate physical health. It's not really worth worrying about. Good to see you're one of the New Generation Navy, though, with your high PRT scores. Me, I was a minimalist 60/60/12:00 sailor, because there was no benefit for me, on the time-cost-return scale, to do better on a PRT. Doing 60/60/12:00 cost me five hours a week - one hour of PT per day - to maintain. Improving would have doubled the time requirement, which was not worth it to me - I had liberty to be concerned about. And yes, in the pipeline, you worry about five hours a week. That's five hours of extra sleep, or a trip to the beach, or a couple movies. Anything to get you away from Rickover's Party Palace. And that five hours is even more important in the fleet, unless you just enjoy PT, in which case you can PT all you want. I'd rather be playing paintball.
You know what I did before boot camp? Drank, partied, went to classes (Occasionally. There is a reason I wound up in the Navy instead of getting a degree the first time in college...), screwed around with my girlfriend, anything but actually give a damn about the Navy. Once you hit boot, your ability to have unrestricted, unconcerned fun stops. Because then the watching starts. If you're underage, in the words of my skipper, "Don't get caught drinking." If you're of age, but drunk, "Don't get caught driving." Random piss tests. Moments where you're gonna look at a situation and think, "My career or my buddies?" So, like everyone else is saying, go out and enjoy things.