What carrier do you have even with a booster you might not get anything
Personally my Verizon works about everywhere including the mountains of Arizona in several locations this past spring
2012 Winnebago Journey 36M Cummins 360
2014 Jeep Cherokee
492 Campgrounds,107K miles driven in our Winnebago motor homes and 2360 nights camping since we retired in July 2009, 41 National Parks