What is the weather like on the top in mid sept? I know there is snow months earlier than the rest of the region, something to consider if the date were to be set for that time.
It'd be a shame for some come up on summer tires, only to hit snow and ice half way up the mountain. Also consider that peak tourist season for the area is mid sept....traffic will be heavy and the dumb come out in packs. Although spirited driving isn't advised on the mountain...everyone always has fun on the roads getting there.
Not knocking the idea, it's a good one and I'm going to watch this. Might tie it into an event some of us do in the fall anyway.