Sorry not to have answered this question sooner. If you want to join, you have to come out and submit a membership application (It's not hard). The biggest thing is showing up and letting the guys get to know you - then we vote on accepting the new member. Unless the dues have changed, it's $200/yr for the first year to be a member. After that it's less. To be a pilot, you need to have the tailwheel endorsement and demonstrate proficiency to one of the flight instructor members. We do NOT do instruction in the aircraft, except for checkouts. Also you have to have current and appropriate insurance coverage for the aircraft you want to fly.
Right now I think we're maintaining about 5 or 6 planes, but several members also have aircraft on the field, and most of the guys help each other out.
I just updated our website a bit. Including a link on the past events page to a photo gallery from Fredericksburg back in December.