The Association for Experiential Education (AEE) offers regional conferences each spring. I've attended AEE regional conferences and have presented at them as well. There are always great workshops and great people to learn from.
From the AEE website:
AEE sponsors a variety of events for experiential educators, practitioners and students from around the world to come together in a supportive community with the goal of promoting, defining, developing, and applying the theories and practices of experiential education.
AEE conferences are designed to help you to develop professionally, find employment or employees, learn valuable new strategies and skills to integrate into your work, and develop lasting personal and professional relationships.
The conferences take place in 8 regions of North America during March and April.