Just returned from a three-week trip to witness the total solar eclipse in beautiful Grand Tetons National Park. Surprisingly, there was next to no wifi or internet access in any of the national parks we visited. We went 3 or 4 days at a time without cell service or being connected, even in modern lodges like this one at Jackson Lake. We didn't really mind being off the grid because we got to immerse ourselves in seeing the natural landscape and abundant wildlife.
I heard that - no cell service - I was in Salt Lake City and it was magic! The huge Tetons are a great subject for photos! This looks a great lodge with those windows!