Andrew,
Bowl in as many big tournaments as you can. List things like how you did at Nationals, State tournaments, PBA Regionals (as a non-member), etc. The coach is looking for performances in big tourneys on difficult shots. Judging by what you have listed in your profile you have a better than average chance of being invited. All you need to do is list your accomplishments.
Look at the AF services web page and print out this years listing of invitees. I took that list and looked up those names and how they finished compared to me at Nationals. I printed out their scores and mine and sent them in with my 303. I was invited that year. The year before I was in Alaska, I bowled in the state Team USA qualifier, and several scratch tournaments was the City scratch champion, and finished 3rd in our All Star points total. I bowled 4-300 games in 3 different centers that year and did not get invited. Chuck is looking at big tournament performances that he can use to compare you to other high level bowlers.
Another great way to get recognized is to bowl in the Military Classic tournament in Vegas at the end of January. The coach is there scouting players. Keep working on your game and bowl in some high level tournaments and you will get an invitation.
Good luck,
--------------------
Todd
Bandit Lanes Pro Shop
Ellsworth AFB South Dakota
605.385.2536