Don, the place I collect is up in the santa cruz mountains. It is a fairly rough drive over some dirt roads, definitely 4-wheel drive country. But once at the property, the trees are pretty easily accessible. I pay the owner of the property for the trees.
They are relatively easy to collect, in that you don't have to worry about getting a big root-ball. You just have to get them out of the ground, which does require a lot of digging and then cutting through some really bit roots.
If you are interested in going up there with me, let me know.