Mark - for what it's worth, I agree that those two September dates would be great. Also August 18th would work for me. Those three dates, and you can count on at least one Puget Sounder making the trip down - provided a firm date is set soon, my calendar is filling up fast, as I'm sure others are around this time of year as well.
Just providing input, it's you guys' event and the date's gotta work for y'all.
