I use GAIA basic on the iPhone from Nunavut, the NWT, Northern BC etc, all the way down to the Mexican border. Wouldn't leave home without it. From finding a new tree stand in the dark in Coues deer country, putting in your camp or truck coordinates, aerial photos, it is really good. One time in N BC we found a new swampy lake in the trees we didn't know existed and called a moose in because of GAIA. I also carry an InReach if out of cell range, which includes all my hunting in Northern Canada and most of my hunting around home. I've IR'd pilots, friend and primarily family nearly a thousand times in the past two years. Granted I probably hunt more remote and more days than many.
Obviously people have survived and evolved without GPSs and aerial photos, but it is sure nice to have. I do carry a small Marbles brass compass as a backup.