We run Dumont mostly. Glamis about twice a year. Run with about 3-6 rails. Don't know how you run without radios. Never fails we will have one car without a radio and it is the biggest pain in the butt, especially if they seem to not be able to keep up. Even the RZRs in our group run radios. Anyway, never a specific channel, just whatever we happen to be on. It is by far the best addition to anyone's rail. Just my 2 cents.
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