I wish I could make it, but I'll be tied up student teaching at the time...bleh.
Just a suggestion, but you probably will have better results late September rather than in the beginning. My experience has been that "peak" is generally later in the month; though, it will vary depending on rainfall, etc. Also, the maples seem to turn quicker than the many of the birch groves. So, if you plan on shooting from Oberg/Leveaux that might be a consideration.
Just for kicks Here's a couple from the last week of September '06, 4x5 on various fuji film:
Clearing Storm, Carlton Peak
Overhanging Autumnal Birch, Devil Track River