Be aware that cell phone coverage is a consideration. We got lost one time, and the wife pulled out her cell phone, with a GPS app. Then we entered a dead-zone: no cell coverage, and the phone became a paperweight.
We generally prefer paper maps, but we've carried our satellite GPS a few times. The one time we tried to use it, it failed: I updated the map the night before we left, so we'd have the latest information; when my wife turned it on, she asked me, "What State is 'GU'?" There was a glitch in the download, and our US map had been replaced by a map of the island of Guam! We packed the GPS away for the remainder of our 9-day trip, relying solely upon paper maps... Never had an issue.
I admit, using the
Points of Interest feature on a GPS, to locate gas, food, and lodging, is very helpful. Aside from that, we really prefer paper maps: no "updates" to download (Guam...); no batteries/chargers required; cheap (usually free!); and they are far easier to make water-proof than a GPS (clear Contact Paper, on both sides, makes them pretty much waterproof, for pennies -- besides that, you can write on them with water-based pens, or grease pencils, even). Cheers!
