I'm headed to Colorado this year for elk and mule deer. Im as green as Ireland to hunting out west in mountains. I went and bought a GPS. A Garmin Oregon 450. Now I need a topo map. I have basecamp on my PC. Im thinking i want to use Basecamp to load Birdseye of the place im hunting and then layer that with topo and unit boundry lines. I seen the maps for sale on this site. Which one should I get? (BLM or Platt) ?? Is BLM the same as hunt units? I'll be hunting unit 48. I would like to see its unit boundrys. Any help will be very appreciated. If anyone has recomendation on any areas I should hunt in 48 please PM me. I'm so new at this and cant go scout like the Eastmens . This first hunt will be more of an experiance.