http://www.verizonwireless.com/wcms/consumer/4g-lte.html
according to their website, Verizon now has 4G service at that address. 2 years ago we stayed at Mountain Meadows and had the same problem. We were in the valley and the mountains were between us and the tower. The park used a booster for cell calls. I now have the Wilson Sleek booster and it works both on my cell phone and on my Mi-Fi. Walmart about $100. Get the suction cup window mount and the taller antenna for a few dollars more. I haven't used the Sleek in MT yet but it's worked everywhere else and it is similar to what Mountain Meadows used.
