I went out and bought a handheld unit. works great from garmin with topo.
the garmin does not route you on the roads like the cell phone on google maps does. the gps just gives a rout as the crow flies. works great once you get to the location.
google maps does not need cell reception to work...YUP THAT RIGHT! I go offshore fishing 60-120 miles offshore 2times a month between prospecting and you always can get a google maps icon with your location. it is a Satellite that it works off of as long as you have your location setting on.
I love to use google maps and punch in all the GPS numbers from the claim guide. start with one location and add the other coordinates like you would list near by locations in the area. they will save on your map if your logged into your google account. you can see yourself moving on the google maps screen as you drive. when you get to a location you can drive no further...that is when the hand held GPS comes into play. it will walk you to the location your searching for.