What's the number in terms of sign ups so far? Also, in case we need to find tennis courts. Here are some 200 listed. If all fails, I am also a member of the Reston Association and can get guest passes. We have 26 lighted tennis courts for Reston.
http://www.fairfaxcounty.gov/parks/courtlist.htm
http://www.reston.org/parks_rec/p_te...ed_courts.html