I threw this idea out a few years ago...
To be on the DD list, you must make your pass at an officially sanctioned Stangbangerz DD event. There could be 3 or 4 "events". Have 1 early in the season, 1 in July, 1 in October, and an early November. You could also have these at the different tracks...E20, TS, and KK.
Keep it simple...
1. You must make your pass at one of these "events"
2. You must have a current registration/insurance card
3. slicks/trailers are ok