But what happens when you get dropped out of the back of a plane in the middle of nowhere with your GPS (but it has to be somewhere in North America, because you don't have the maps on your GPS for anywhere else).  You're really gonna wish you had all those maps so you know just how far it's gonna be to civilization... 'cause you know, that just happened to me last week.

Actually, that is a really great point about the more maps you load the slower it gets.

Since the price of MicroSD cards are really cheap, you could put different map regions on difference cards as you suggested.  And you could probably tape them down inside the battery panel on the GPS so you don't lose them.

Jake - Team A.I.