Mr Johnny Oat, Pay attention, step one...select a smartphone (you may have one already) that has REAL GPS imbedded it does NOT need a cell signal to operate.
step two...load Avenza or any mapping app
step three...use it.
Why, you ask? Better battery. Powerful fast operating system. Better screen graphics. Flexibility to send information to printer or another computer when you
do have a cell signal.
Google gps smartphones...they list brands and models that have real gps instead of just cell tower triangulation (for city folks)
