The conference is happening in Aiken, SC, June 8-11.
Lots of great sessions about Project Learning Tree, native critters, Ecoliteracy, and much more that is applicable to the EE you are already doing in your school gardens!
It is super affordable -- only $135 for non-members, includes some meals.
Aiken is just across the Savannah River from Augusta, GA, and one hour from Columbia -- so easy airport access too.