For the guys going, I recommend some way of airing down your tires. I used a valve stem remover and backed each one out a few turns so all four tires were airing down at once. There are several tire deflators out there, and I have a set now, but the valve stem remover is cheap and easy to find at any auto parts store.
I also recommend having some way of airing back up. I think Ed and Mel are going and Ed just set up an OBA system, but it puts a lot of stress on the compressor to air a lot of tires back up. I lent Brad a heavy duty 12V compressor, but anyone else bring one would be helpful.
I wish I could go, it's a great trail. Lots to see, great trail to bring a significant other, friend, kids etc....