If it does turn out to be the 23-25 weekend, you can add me to the list. I've only been to Lake of the Ozarks twice(and never camped there). Looks like a nice campground as far as car camping goes.
If it did turn out to be busy, the map shows a couple of primitive camping areas('PC' on the map) that appear to be car accessible. Those could always be a last ditch option.
I'll be following the progress of this thread.