Just be up front and honest when the question comes up. If in the application process the question is asked, definitely don't lie and definitely divulge everything because you'll have to anyway when it comes time for your security clearance.
Side note: I received 2 underage alcohol violations and had 9 moving violations before I was commissioned and it didn't affect me in any way. I was just honest with what happened.
Send applications out to as many units (Guard & Reserve) as you can and just be yourself when it comes time to visit and interview. Per a friend of mine in the Reserves - "we can train a monkey to fly, we want to know what kind of person you are."
Good luck...