Free: Contests & Raffles.
Another vote for the Garmin Rhinos. We like ours and it is really nice to have the mapping features to keep track of everyone in your party.
If you have deep pockets get everyone a Garmin Rhino, we use these things snowmobiling so if they'll hold up to that they'll take anything you dish out hunting. Also it's sure nice to see where your partner is without even talking, they just show up on your GPS map in almost real time.
your friends can be programmed in to show up with there name or whatever you program it as. you will pick up other hunters, and I believe it shows up as a default name.