You know, as the event grows, this really isn't a bad idea. Maybe even taking on topics through the day that are diverse, but aviation related.
For instance, my diabetes "scare" woke me up to the medical process and the research of others (many club members e-mailed me) could benefit those who have not yet received the news of a health condition that will certainly strike others.
Another forum....IFR....I am finding more information by talking with people than the internet.
Mountain flying....Using Flight Following...and so forth. A lot of questions can be answered in either a Q&A format or a presentation.
Now...the problem is, with a full day of flying and having fun, who has time, But...let's get the topic on the table anyway.
Charles maintenence forums are a huge success from all I have read, and one example of how this can be used. The Cardinal group takes their two or three most knowledgable owners, and pull the cowl off of a couple volunteer aircraft to show people the foilables associated with the Cardinal. In the process they usually find some flaws, and they are not even A&P's.