I've heard places like Disneyland are nearly impossible, with too many
users. Many of them saying nothing important, and some of those
shoutign into the mic to get through.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


Umm, no... A busy channel is a busy channel... Even if you set a
different selective calling "privacy code" you will still experience
interference if you are trying to transmit on a channel someone else
is using even if the group using the channel is on a different
"privacy
code" than the one you are trying to use...

FMRS and GMRS only have a set number of channels, the permutations
you speak of are fictional, as a channel that is inundated with users
in your area will make it all but impossible for you to use the same
channel...

~~ Evan