I have a KX set up for MX.....
I'm still leaning towards North Carolina Motorsports Park... They have a bit of everything...and it is for the most part a 1 day drive for everyone on the Eastcoast.....
http://www.ncmp.net/ncmambo/index.php?option=com_frontpage&Itemid=1
I know you guys are just about tired of hearing this, but Crow Canyone is like that too. And It's about an hour North past the OH WV boarder I think. The things I know for sure is 400 acers of trail, a kick ass MX track, a pretty cool Pee Wee track (for Jacksonyeah but us younger dba-ers wont be able to go
) and some Hill climbs. They also have camping there without hook ups, full time parts shop, and really good open clean pits. When SD comes up for the summer its about an hour or less for both of us. Also a kid I know named Jeremy Mach live about 45minutes away and goes there all the time, if you were really desprate for people to come. Just a thought though!
http://www.crowcanyonmx.com/Home/tabid/36/Default.aspx
I am sorry i swear, will ever forgive me??? You can have Riley's job if he straighten his shit out. 
The Powerline trails are just 40 minutes away too! (They held a GNCC race there last October) Wellsville is only 45 minutes away as well! (Insane hillclimbs, plus lots of trails and single track) My cabin is in the middle and surrounded by great riding! For the adults, there are trails that connect to local watering holes minutes from my cabin! 