Now, before we get to the the new tag, I'd like to ask a simple question with out stirring the pot. (we all know you can only post wit mal-intent on ADV, but try to understand this is only a question)
Question: Who are we referring to as "garage kept few hundred miles a year riders"? Personally, I just bought my first house with a garage a few weeks ago and I know I've done at least a few hundred miles since then. It seems like these alleged "Garagers" would be prime to play your Charleston game. I'm not sure I would want to alienate a potential group of players so early in the game.
Good luck, I hope your Charleston game is successful.