Agree with all of the above, but have a couple more thoughts.

The ruggedness of the phone can be significantly improved with purchase of a proper protective case. Otterbox Defender is my choice, I have dropped my phone on concrete from the chest height a couple of times - no problems. Some may consider a waterproof case or watertight phone models.

The extreme power consumption of the screen is true for the OLED screen. An ordinary LCD may be a better choice for the field phone in that regard, however, such a screen may be hard to see under the day light. So, in the rural area you must switch to the airplane mode. It is definitely saves battery a lot.

Then you need a proper app for the navigation in the desired settings. Going around the town is one thing. Hiking in the woods - completely different one. IMO, the need in GPS help is usually required if you lost the trail for some reason. So, forget the google map, it will be useless (even its offline clones). You need a GPS logger/tracker app with a waypoints database, so you can get back on trail fast. Sure thing you need to plan and prepare trail's waypoints ahed of time you hit the road, and also make a habit to add new waypoints as you progress on the trail. But that's a huge topic by itself.