Hi all. My son and I are flying to Bozeman on Saturday to go backpacking for a week in southern Montana (around Red Lodge just above Yellowstone). I really don't expect ANY cell phone to work where we will be camping up in the mountains, but does anyone know if our phones should work anywhere around that part of the state? I've had people tell me it's a "Verizon only" area, but I haven't confirmed that yet. Thanks in advance. -Matt