Ok, not so strange that fish were moving up and down the stumps. However, if you ask yourself why, it becomes a little more interesting.
Would you think that maybe water temperature is playing a role here? As the wind picks up, wave action begins to drop the amount of available sunlight, thus water temp. slightly changes, but not to a great degree.( We will get some better numbers on this.) When the wind lets off, water temp. rises quickly, and more sunlight can penetrate to a greater depth, thus warming the sub surface temp. slightly.
Shallow water warms faster than deep water, and thus cools quicker. So why are the fish holding in 11-12 feet of water and appear to be scattered? What if, and at this point, a big if, the food source they are seeking is highly temperature sensitive and a large part of this food source's life cycle depends on a certain temp. at a certain depth, AND water depth is critical to this life cycle. Do you think maybe the fish are moving up and down seeking that food source?
There are a lot of questions yet unanswered and many more to be asked. Presently, we are working to identify particular insects and understand their life cycles to a greater degree.
We will keep working on this and keep you posted on our progress. In the meantime, keep checking to see what your fish are eating and let us know what you find.
Good Fishng and don't over think it.