I count 14 so far. I'm pretty confident we'll get a good turn out but I did want to have 20 people at least tentatively say they will come. PM your buddies and get them to post.
I didn't speak to the sales manager about the parking today but I'm pretty sure that you can park for the $10 fee and if not there is parking across the street that will probably be about the same for 8 hours. They have a whole catering/meeting business so I can't imagine that they wouldn't provide parking for those events without a guest room. I will get confirmation tomorrow.
There is also a free shuttle from the White Plains train station to the hotel. I'll see if I can get a schedule.
I even put a link in my sig in an attempt to promote this.
It seems like there are tons of NY area Head-Fiers, but a lot of people never even see these threads.