Typically the rule of thumb for me in the western Basin has been channel 68 is what the Casters use and channel 79 is what the Trollers use, either one will be busy but that is the general rule of thumb. Like others have mentioned certain marinas and groups of boats have their different channels they monitor, in some cases these are tuned in between regular frequencies that make them harder to find. Most charters will monitor their secret channels as well as 79 or 68 depending on how they are fishing.

This does change depending on what end of the lake you are on, I believe in the eastern end of the lake channel 68 is used more commonly then anything. I believe there are 2 channels in the western basin due to the sheer numbers of fishing boats out there, I am sure the guys casting don't want to spend all day hearing trolling boats asking each other what their intentions are and could you give me room conversations that happen a lot on 79.