You'll only pickup other users outside of your party if they happen on the same channel as you. Most of the channels have a ton of sub-channels available, so the likelihood you would pickup anyone else is pretty slim. Of course, if you use an easy one like Ch.1 Sub 23 you might be more likely to hear others. I only picked up others because I was bored on the top of a ridge and scanned all the channels

Happened to pick up a few hunters on the other side of the freeway, about 15 miles away. It was actually good entertainment to hear what other hunters were up to.
Anyhow, hope you got the info you were looking for. Rinos are a great all-in-one options. Deciding which one to get depends on how many bells and whistles you want/need.