I've thought about this for a month, also had signed up for Tuesday 10/9. This morning i went ahead with hotel, flight, and rental reservations.
Yes it is expensive, especially since lodging, etc is not included, but it is a unique opportunity. Plus I'm staying an extra day or so to sight see. My first time in the area.
I do have HPDE experience from years ago but am using M Schools to get back up to speed and improve my skills.
2013 X3 35i, Vermillion Red/Sand Beige: MSport, Premium, Technology, Premium Sound, Hud, More...
2012 335is, Space Gray/Oyster-Black: DCT, 19s, Premium, Convenience, Nav, Heated Seats, More...
Gone '11 X5 50i, '09 Z4 35i, '08 550i, 06 X3, 06 650i, '02 M5, '99 540i