Look into the OpenSignal app for your phone. It gives you a cell coverage map based on people using the app. Green Dots good, Orange not so good. Also has a internet speed test built in. So just because you have 4 bars LTE does not mean your internet speed is good. I do see some good connections in the middle of the lake at Bullfrog but not so good on shore. Don't see much for connections south of Halls until you get into the San Juan. More people that use this app the better the coverage map data.