i love these kinds of topics.
if you feel the need to shoot a great white, your probably not going to be able to.
In california you are allowed to carry (as stated) WHILE fishing. but you cannot have it loaded while in the car or walking to and from the place. this gets kind of fuzzy when dock hoping in the bays. you have to "walk to and from" each destination and loading and unloading a fire arm before each spot change creates an "open carry" situation.
Out here in Florida they got it right. we can open carry to and from and while fishing. even while transporting our gear. and a CCP only requires an application form with a mailing address for military.