Help with my road trip in the states in August

[RC0013]

I planning on going to the Nascar weekend at Watkins Glen on the weekend of the 7 and 8 on August 2010 and as i'm coming from England i was thinking of making it a good road trip holiday. As well as the nascar at the glen i'm thinking of taking in the AMA outdoor motocross the following weekend at Unadilla 14 August. Then the next weekend down to Bristol tennessee to finish off with the sprint cup. Then home on the monday. Looking to flight into Washington dulles international airport and home fron there. So i need some tips on roads to use and cool things to see on the way to the race meetings. Please help if you can.
THANKS