I don't have much to add but have you checked out your local SCCA website? They should have a great guide on what's needed to get going. Namely just an approved helmet and making sure the car is clean of stuff inside/trunk.
I'd also imagine that because the seasons are changing that new race days are probably all but done for the year.
What part of Wyoming are you living in?
Feb 2011 Ride of the Month ~ 2011 Hatch Nation Hatch of the Year ~ 2011 Focus Fanatics Ride of the Year!
Hatch Nation #2