This will sound really stupid, however the absolute most promising way to locate Shark is to have a really good powerful pair of Binoculars and scan the horizon to shore for fins! :thumb:
Seriously, the majority of hookups are due to sight fishing... once I spot a fin, I take my bait, which is normally a 5-12" fish carcass and fill it with Bloody Tuna or Menhaden oils (I will quite often stuff a sponge into the baits mouth to absorb extra scent) and cast it out into the channel or eddy under a balloon setup and let it soak. If a Shark is close, it will smell it and come in, so keep refreshing the bait and the scent. In Shark fishing, don't expect to hook up every time out or to even get bit. Nice thing is there are other fishes that also like big baits floating close to the the Rocks.
As you notice, I keep mentioning Rocks, Channels and Eddy waters... that is because unless you actually see Sharks foraging along the sand of the beach, odds are you will not hook up. The Rocky outcroppings, Jetties and off-shore Rocks close to deep water drop offs are where they like to forage and ambush their prey (dinner). Strangely enough, however the Cove at Seaside is one of those unique beaches that have that 'special water' that also produces 'Sharky water' due to the offshore structure... rocky bottom with sudden dropoffs... makes the surf build nicely for Surfers and provides a habitat for smaller feeder fish that the Shark enjoy for dinner.
My favorite setup is a sliding balloon with mooching sinker trailing about 6' of leader tipped with a 12" Stainless Steel leader (because Shark have sharp teeth) and two hooks... one is Octopus Circle hook and the other a Baitrunner or Live bait hook... and depending upon what I see, they run in size from 2/0 to 8/0... so as you can see, you don't have to worry about hooking a little fish. Sculpin, Perch, Cod, Shad and big Herring all make good bait... as does good bloody Liver from the local butcher! To a Shark, these are all like a good big slice of Hermiston Watermelon to us! :watermelon:
AND ALWAYS GAMAGATSU OR OWNER HOOKS! :worthy: