According to their website:
This is your chance to share your passion, ideas, and knowledge with over 800 of your peers in the field of state and local history. You’ll have an opportunity to learn from over 80 sessions and 17 pre-meeting workshops that directly relate to the latest issues and trends that you face. And, you’ll also have an opportunity to have fun while you explore Rochester’s amazing history through the evening events and tours.
Although apparently they’re keeping the costs of the conference pretty quiet (good luck finding it on the website), you can apparently register