First time posting. I have a lot of problems telling private land from BLM ground. Some areas of travel are narrow and I don't want to get on private ground. I need a good GPS that will show real time accurate location, the line for public vs. private land, and my exact location as I move. I have read a lot of good comments about the Garmin Oregon 450T. I have also heard a little about the Montana. Any feedback or suggestions would be appreciated.