I'd feel more confident using a dedicated GPS, if only for the fact it runs on AA batteries and you wouldn't get stuck with annoying smartphone behavior or apps

I'd feel more confident using a dedicated GPS, if only for the fact it runs on AA batteries and you wouldn't get stuck with annoying smartphone behavior or apps crashing. A Garmin GPSMap60 CSX for example is an excellent device, basically bulletproof. Just make sure you learn to use it in advance, have the proper maps (OSM) and don't get caught with coordinates in the wrong formats. OSM is so detailed it's accurately displays mud tracks in remote areas of Vietnam. I thought "this can't possibly be right" but it certainly was. Dedicated device is best, smartphone is a good backup.