Dean I may go but I wouldn't be able to help with the drive down. We would be coming from a different direction.
As far as your sign up goes I've ridden with RideSmart a few times now and you will be fine just signing up for the advanced class. You don't have to go to the classes if you're riding in advanced.
With that being said there are a few quirks about COTA to be aware of. If you fall, even if the bike barely hits the ground you are done for the day. Also if you run off the track surface it is grounds for dismissal. It sounds weird but I guess the track governing body is really strict due to the nature of the facility. Also the track is so damn wide compared to anything else I've ever been on that it never seems like your even close to running that wide. It's not controlled really close but the rule is out there and something to be aware of. These are both COTA only rules as far as I have been told.
It's a blast though and if I can get everything to line up I'll see you there. Weather it will be worth it or not is up to you. It was worth it to me even in the rain, but I just enjoyed the experience of riding it.