Parallax Read / Write RFID module.
50 foot CAT5 cable soldered on and the module has been immersed in epoxy in a kitchen container.
Close up of RFID module.
All dry - container removed.
Waterproof, but will it still work???
YES!!! - I'll sand down the epoxy a bit, and then the whole block will get hidden in a tree stump by the tree house.
Reading a tag!