What type of device are you suggesting then?
A Garmin GPS unit, especially if you intend to travel internationally.
Free TOPO Maps can be found here.
Garmin's Basecamp software available for PC or Mac is a great free offline route planning tool. You can build a data base of the places you've been, where you plan to go and where others have traveled. The software loads and utilizes the map set stored on the GPS when the software is launched.
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