Larger fish are caught by the bobber fisherman. The biggest I caught this past year was about 8#'s but freinds of mine hit fish to 12#'s.
I think the small showing of larger fish to the beach is not because of a lack of fish but because the smaller fish are so prolific and agressive. When the tide is swinging hard it is literally a fish a cast and during the peak swing you will have 2-3 coho chasing after your herring.
Once the tide dies the show, the fishing just dies. It is amazing!!!
Large kings and chums are incendental catches on the beach which can add to the fun and excitement. Here is a pic of a 20#+ king caught off Casey.