I have the Etrex Legend also. I haven't put any extra maps into mine... I haven't needed to. I've used it in Minnesota, Iowa, South Dakota, Nebraska, Indiana, Kentucky, Illinois, and Wisconsin (not all for sledding). Never needed any extra maps downloaded. I have the Topography software for my computer so that I can download the tracks that I make while riding or driving around. Then I can make pictures of where I went to show other people if I feel like it.
I have a RAM mount that I picked up on Ebay. It's mounted to my steering post and holds the GPS nice and tight. It's stayed in place both times I've rolled my sled.
You should be able to pick up the etrex legend for under $100 and the legend cx for just a little over that off of ebay.
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