I looked online and found some more information. The website states their participants are about 50/50 secular/non-secular. They do have a list of topics presented. It's 3 or 4? days long, with probably 100+ booths. Topics range from how to stay organized homeschooling to keeping kids behaved to STEM and LD, as well as quite a few sponsored by sellers (10-20%) or so.
I did not see any specific topics for gifted, or else I'd sign up right away. But to pay that much to browse through curriculum... not too sure. There is a gifted state conference in the fall in my area (if I can wait that long). Seems that would be a better place to meet other gifted parents from the area. And I'm already fairly committed to summer afterschool curriculum for the time-being.