Only in general terms. Like which activities can you have going on simultaneously on different parts of the lake? Also maybe it would be an idea to try and get some advance indication of numbers and who has 2.4 Radios as opposed to those which will need to be subject to frequency control.
Maybe one way to do this would be to set up two survey topics. One could list the activities such as free sailing (power), free sailing (sail) Springer Footy, Straight Running, Speed etc. and then you would see just how welll each one would be likely to be supported and can allocate time accordingly. Of course a number of people are likely to be involved in more than one activity - can the survey deal with that?
The other survey could just list the radio types, 2.4ghz, 40mhz & 27 mhz which will give some idea of how likely you are to get potential frequency clashes.
I also think that the frequency board should be "bookable" with say 20 minute sessions for free sailing with somebody in charge of it rather than just allowing people to grab a peg and possibly hang on to it. Obviously if there is a structured activity taking place on part of the lake, such as Springer Footy, Racing or Tug Towing then people participating in that would have first call on the frequency board during the time set aside for that activity.
Just common sense really.
Colin