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Well, maybe on a perigee tide spring and fall but I have worked right on the Ortega River here for the last 13 years and the norm is 3-4 feet differential I have always thought they were tame compared to what we had daily in CT at the mouth of the Mystic River. Maybe I just haven't been at the right spots here.
We have some flood tides that 5.6 high,and the low is around -.3ish. Those are the biggest swings I have seen. I love fishing the flood tides and cannot wait for them!
I wouldn't really even call it a tournament, because I think it has somewhat a negative connotation. Since, it implies the competitive nature(which can be bad for some) and also money. I see this event as more of a get together and some fishing for bragging rights, all in good fun.