Even my iPhone has a sat linked emergency text option. It’s tough to get lost like that in most of New England. But I would make sure I had some sort of emergency tracker on me if I were out west. It’s BIG out there.
Try the Allagash in Maine, if youget lost you could end up in Canada, or drowned in all the water features, or just wet in cold weather, and die of hypothermia.
I have an older Apple iPhone XS that is no longer in use as a telephone. The GPS chip in the phone is accurate within a couple of yards. I have a golf range finder app installed on the phone, but have to load up the course on WiFi before heading out to the course. Apple Map has the ability to create offline maps at least with the newest OS version. Third party offline maps are also available.