This http://www.midwestminisprints.com/schedule.html is probably the best place to get started. Buy a pit pass and come offer to help one of the racers with their car, most often they'll say yes as long as you've got at least some mechanical aptitude. If you're not sure who to talk to, look me up, I'll usually be bombing around the pits on my 4-wheeler trying to get all these misfits organized. If you see someone on a white YFZ450 with an MMSA officials shirt on, that'd be me.