Strut, I had the priviledge of meeting a guy a couple of years ago that was an instructor in mountain drug intradiction. He spent a good amount of time teaching me the finer points of GPS usage.

I have since spent countless hours and days goofing off in the woods using various Navigational aids, but most specifically the GPS.

For what it's worth, any GPS that you decide on will have the basics for getting around in the woods, it's learning how to use your specific model that dictates how effective it is.