If I can get away with it, I'd like to just take my phone. It has gps with the back country navigator and the camera on the s7 is pretty good too. I'll have it on airplane mode the whole time I'm out, and probably turned off the majority of the time. The downside to the new Galaxy phones are that you can't bring a backup battery anymore (at least it's beyond my technological capabilities).

Thanks for the replies everyone. Something to think about. As mentioned previously, I'll be able to test the limits of my phone battery pretty soon while on a car camping trip with the family to better assess what my needs are.