I'm in. That's just around the corner from my house, so I even get to sleep in (sort of).
I haven't ridden the course, but have ridden all of the terrain that the course encompasses. Tacchino or DCCX are probably the closest for comparison.
Course map here:
http://www.potomacvelo.com/events/cc...map%20copy.jpg
From the start, the first looping bit is on a slight hill side, so some of it will be off camber. The approach to pit 1 is uphill, and as you pass pit 1, you climb up onto the dam. Cross the dam is flat, but can be very windy. After the dam, you climb into the woods, I think this is mostly double-track, with a few short steep bits (should all be rideable). Back into the open, below the dam, skirting the woods. Mostly flat past pit 2. Past the restrooms is mostly flat, loop around a gravel parking lot (not sure if any of the course is in the gravel). Unless I've forgotten, I don't think there is any sand pit.