I also like to screw the fence down on the saw hook. Since I will be cutting a kerf into it, I mark where that will be so I don't saw into a screw. I've found when using 1/2" ply it's best to screw from the bottom into the fence instead of the other way around.

I do not add screws to the bench hook with the shorter fence. Many times I plane into the fence itself and don't want to risk hitting a screw.