The only fun thing about Navy OCS is the camaradarie. You will go through (mostly lame) experiences together and be able to laugh about things that nobody else will understand.
I remember trying to tell my family a funny story about OCS. At the time, it was one of the funniest things I had ever experienced. The punch line, however, was that a particular candidate had his cover on crooked. Needles to say, they didn't get it.
As far as actual "fun," there isn't much. If you are picturing hard core oo-rah training, Navy OCS will be a little different. It is mostly ironing your underwear in 6x6" squares, studying academics, and hauling around a wooden rifle with the barrel welded shut. It isn't really difficult, but it isn't fun.
One of the class officers was a P-3 pilot. If the Navy gods ever punished me in such a way, I would probably just walk into a tail rotor. Well, maybe not, somebody would have to clean it up.
Not that I am trying to discourage you from going to OCS. Just see it as a means to an end. Once you get your commission, you can move on and hopefully contribute something to the Navy and the nation while flying really cool $hit.