Try a search on MOJAM. Mosouri Jamboree is a free weekend function hosted by the local archery club in the small town of Marshall, MO. This will be the tenth aniversary event. Started as a gathing of internet friends who wanted to share self bow building knowledge. They limit vendors, sell some food and have a fundraising clout shoot to pay some of their costs.
I have attended several smaller versions put on by individuals who pass the hat to help pay for porta potties, pavillion rental, trash hauling, etc. Do a search on "Bradjam" and you'll see a typical small scale bow building gathering.
Ted Fry (Raptor Archery - TG Sponsor) out there would be a good resource for helping get one going in your area.