Firstly, if your boat is small, you are gonna have to pick your days on BOQ. Being on Big Island, you can easily troll Big Bay. It's a relatively flat bottom, in the 15 to 25 ft depths.
Run 3/8th oz crankbaits as close to the bottom as possible and run the length of the bay. Use your planer boards. If you have lead core, it makes it easier to maintain bottom contact.
Again, and I can't emphasize this enough, it's big water that can blow up very quickly, so be very careful.
HH