T.R. Zimmermann has been giving wild edible classes in the area for a number of years. I have gone on plant walks with him ans he is increatablely knowledgeable. His background is in ethno-botany. Mister Zimmerman is not in the best health these days and cannot get around as well. So I am not sure if he is still giving classed. A brief search came up empty, so I am not sure if he is giving classes anymore. If you cane get in on one of his classes, it might not cover everything you want, but it is a step.
I'll try more info and post it here