I'd bring waders, sometimes it gets chilly there, if it is nice and hot, leave them in your stateroom.
The Islander usually has sardines, if you want bait other than sardines, you may want to bring a sabiki rod. If you want to save space, bring a sabiki, make bait with your jig stick, then wrap the sabiki around a piece of pool noodle.
Love the Islander, 3 weeks!