Time to get a new GPS and load up the topographic map or even airphoto's to use as an underlay.

No, I haven't my self done it yet but at the shop I saw a Garmin Zumo 660 with the topographic maps so that was the unit I got. When I save the money it is the first thing on the list, (just under centre stand, handguards).

http://www.oztopo.com/

All the data fits on one of them little mini SD thingo's which you need for carrying the MP3 tunes anyway (always good to have a bit of Elvis (gee it doesn't seem like 33yrs - RIP) in your helmet on a long trip).

And you can zoom in and out, it works well but the only problem is you can't see everything at once to "get the big picture".