UGH!!!!!

My dad and drother are coming up from California to fish with Clancy April 10/11, would that blow if they closed it down 2 days before they both came up! I just wanted to get those 2 into there first salmon and if they dont because the river closes on account of the sealions and the commercial's thenn i am gonna be so pissed along with everyone else! My dad does have about a dozen shotguns and tons of 12 and 20 guage loads, as long as the sealions are close enough we could scare em off and maybe "Manage the sealion poulation" i.e. shoot the buggars!!!!!! Wouldnt that be nice