Anyone else out there use GPS? I got one for Christmas last year, Eagle Explorer. The thing is great. I've used it deer hunting and fishing. The only thing that I don't like is the government screwing with the signals so that its only accurate to 100 yards. I'm thinking about buying a DGPS reciever to eliminate that. I've got all of our stands and parking spots marked on the plotter, and fishing spots too. Anyone got any tips or ideas on how to use GPS more effectively?