As an OU alum (BSC 92). I think that would be a great place for a meet. Couple of things to think about...
Hotel: Make sure your date is not in conflict with any OU dates or you will be SOL. Especially Haloween!
Routes: Cell Phones are a no go due to hills there a lot of the time (kinda nice) make sure you have radios. Also it is very easy to get very, very lost there. I think doing a rally might get half the people to disappear off the face of the earth. Also people in the rural areas don't take to kindly to unknown cars on their roads. I have been on one rally and one meet where people tried to physically impede our progress.