Thanks, everyone!! All were great ideas. I think I'll go with maffeirw's solution for the ground-mounted controllers. I like the simplicity of dropping it over a stake.
What solutions do people use for mounting enclosures to a pole or tree?
I have 4" drain pipe that I'm using as the trunk on some megatrees -- and I'd like to mount 2 enclosures to the center pole and off the ground. The wires are coming down from the top of the tree (to avoid wire clutter on the ground)... and therefore did not make the wires long enough to reach the ground. Again, a solution that avoids violating the water-fastness of the enclosure is ideal.
I've been considering rubber straps that go around the drain pipe, like a tree-climber's rig.