The classes you have posted sound good. I have a couple of suggestions, 1) how about a novice (run what you have) class for newbies and kids. 2) if a large enough group shows up with "open class" short course trucks, consider splitting the class into sportsman and pro groupes based on lap times. We did this in the sedans and monster trucks at the old Hobbytown OP parking lot races and it seemed to work out pretty well.