RE: What trail markers to get???
Motorola to Motorola. My buddy has a T5000 series walkie talkie (don't know offhand exactly which one), and when I tried to communicate with him with my T6400, we had problems. In fact, we could hear talking coming over, but couldn't make it out well. Also, we each thought the voice was someone else because it didn't sound like "us." It came over robotic in tone, if that's understandable. Anyway, as far as I know, it could have been a GMRS (mine) versus FRS (his) thing, or maybe I have privacy codes that his doesn't have or whatever. I can't remember the specifics of his radio and the channels, etc. I picked up two more last year because I thought I might need more last season, was happy with the T6400's and I already had, and was concerned about communicating between models.