I follow the mantra of “two is one and one is none.” To that end, I always carry my iPhone with onXmaps, a separate GPS unit, a SPOT locator beacon, and extra charges for all. You can also use an InReach or EPIRB or whatever you want, just don’t leave it behind.
Lot of stuff, but I don't hunt in the mountains and usually am not out for the day and don't backpack much anymore. No disagreement with his assortment of electronics, but I never enter the woods without a compass and if in an area I don't know, one of those paper things called a map. Can easily be printed out if not easily available.
Also, know your heading and back azimuth before entering the treeline.
On one hunting trip, I was late heading out after twilight to the road to catch my ride. I got dark and then pitch dark. I would have wandered lost and stumbling all night except I had a tritium compass and mini-maglite.
I decided next time to take along some of those reflective thumbtacks for backtracking waypoints in the dark.