Hey Sean welcome to the site. Can I make a suggestion? Don't join as an 11-B. If you get deployed to Iraq or Afghanistan, you willprobably spend the year standing in a guard tower trying to stay awake or working a checkpoint. I got activated as an 11-B for 2 years after 9/11 and I spent it all state side doing base security. Yeah, someone had to do it, but it left a bad taste in my mouth because I wanted to be part of the game.
If you are looking to be a part of the war, I would suggest joining the RESERVES as military police. It may have changed since the wars have gone on, but I found that when I was in, the Guard never had decent equipment and we never got sent anywhere good for training. It was Fort Drum every summer except for on year we went to Ft Irwin in CA. This is just my personal experience, so please don't flame me guys. Thank you all for your service! BTW, MPs don't even really do "police" work anymore. They are more combat oriented now in the Army anyway. If you want the infantry experience, you are really going to have to join active duty.