Ryan, don't be discouraged, and I hope you aren't. Certainly this year did not result in the expected attendance. The Spring Jam is so much easier, because everyone is planning to fish the 2nd, 3rd and 4th weekend of May anyhow. It is an all-purpose FFing event.
These specialty "mini-Jams" will not get the level of commitment from potential participants simply because other "life events" will be more important. In May, what could be more important than being on Penn's or Spring, or ....
It was purely circumstantial that I could not make it this year. It sounds like that was true for a number of folks that otherwise would have surely made it.
If I had to point to the one thing that improves any "jam," it would be a central meeting location and enough people around that at least some other attendee will be around when any other person happens to "show up." This is why, I think, the Spring Jam is successful. Not only because of the time of year as noted earlier, but also because the attendees all stay in the same location, with adequate provisions for a group gathering each morning, and each evening. It helps, as well, to have 17 hours of daylight versus 12.
Thanks for organizing this. I hope to see you all next year!