Depends a LOT on where you are launching , if you drive the extra distance to middle harbour ramps you can avoid the bash through the harbour centre which is a pain for any size boat . my last boat was about the same as yours and id fish the North head area safely on good days id just drive closer to the area. You can also fish area's away from the middle of the harbour channel to avoid ferry and traffic wash , Sow an Pigs for instance hasnt fished any better for me than other parts of the harbour closer to shore, so look elsewhere in the same area.