Hey mate, that time of year can be tricky in a small boat to fish to far out with the northerly’s and storm season
Can be done but like you said pick your days. Drop in and see Tony and his son at the Agnes tackle shop and have a yack to him. He helped me out years ago with his wide knowledge of the area and if you buy something he’ll no doubt give you some GPS marks for your type of boat.
Another option for your style of boat is Baffle creek which is a short drive out of town. Plenty of Barra, Jacks and muddies. Just watch the rock bars and again seek local knowledge.
Good luck it’s a magic place.