Like everybody else, terrific idea. I think I'd be competitive in two out of three categories.
Unless....the drag portion was split into categories. Turbo, VE, DE, unlimited or something. Although that might make things too complicated (?).
I'd also let you drive my autocross section. Even better if having a weight penalty of 220 pounds in the passenger seat would not slow you down much. Might even have my CSK's by then.
As my skills are nil, I have a terrrific time as a passenger. Chriscar and Martin_G37 both schooled me in Savannah. One in my Classic and one in a rental....IIRC....PT Cruiser.