Really it’s a backup I have the unlimited on my phone but I was just concerned about battery life and charging. I have a gps 60 Garmin and AA batteries are super cheap.Why don’t you buy it from camofire.com form$17?
Also, I don’t think you will see a lot of private land that isn’t marked up there.
Are you doing a DIY?
If you are wanting to see the land, check out the map app on Apple products. Pretty clear.