We are actually the only tour in Gettysburg that sets limits on the size of our tour groups. We do that to avoid the situation your described. Unfortunately, one of our affiliates over-booked the tour that night, and we're sorry about that. Please email us:
[email protected] so we can make it up to you.
BTW, the reason we meet in the park is that there is free parking nearby, and there are benches for people to sit on.