18-LE 1 is TG 15106 and is the one that's published here on RR. That talk group is usually patched with 15102, which I'm assuming is Sundance. Also, they handle radio traffic for Devil's Tower on those two TG's. If you can receive the Warren Peak, Alva, or Mount Pisgah sites, you'll hear them. Those sites I mentioned carry quite a bit of radio traffic.
Where are you when you're trying to listen to them?