Maps of the VA Tech campus are available from this link. The same page also has a link for directions and maps indicating how to get to Blacksburg from the surrounding region.
There will be a variety of competitions throughtout the day on Sat, including 5 ball endurance, obstacle course, etc. Prizes will be awarded to the winners.
The actual juggling will be held in a full 3-court gym, with lots of room (both to the sides and above).
Free doughnuts and juice will be provided if you get there early enough.
For some infomation concerning local restaurants and lodging accomodations, try looking here. There will also likely be some "crash space" available for those living on a "student" budget (see the contacts below for more details about this).