I have the Auslig NatMaps 250,000:1 mosaic loaded on my GPS and use that most of the time. I also have the Hema series which I use when they are in range.
Then, for specific events (Camp Coffs, for example) I download the best maps I can find (for camp Coffs I stitched together a mosaic of screen prints downloaded from the Terrain function of Google Maps) and calibrated it using identifiable points for which I could get the coordinates from other maps (e.g. road junctions).
![Image](http://i4.photobucket.com/albums/y149/pipeliner/CoffsTrack.jpg)
![Image](http://i4.photobucket.com/albums/y149/pipeliner/Coffs.jpg)
This one from some maps of Mt Mee that Cmohr printed out
![Image](http://i4.photobucket.com/albums/y149/pipeliner/MtMeemapused.jpg)
If you have sufficient calibration points then OziExplorer "Load and Calibrate Map" function can produce a map from any bitmap picture. On the first and last picture the coloured lines are the actual tracks from OziExplorerCE overlaid on the maps - you can see that the calibration was slightly better for Mt Mee than it was for Coffs.