Check out www.airwarriors.com for great info on the USMC and Navy.....do some good searching before you post any questions though.

They have extensive information though, and I read a while back that the USMC now pays off student loans for new officers.

As for the Civil Air Patrol....thats a whole nother story. I imagine each wing is different, but my wing is a bunch of oldtimers that sit around and BS about flying stories....its fun to listen in on, but nothing that will help your military career. You may get a good letter of recommendation and some flying hours out of it. I bet it depends on where you live as to how active the CAP unit is.