Our eastern boats leave from Double Bay, which sits immediately west of Rose Bay. It is about ten minutes on the water — genuinely the shortest run to a good anchorage we have anywhere.
Rose Bay itself is a wide, shallow, protected sweep of water. It stays flat when the rest of the harbour is choppy, which is exactly what you want if the group includes people who are not sure about boats, or if you plan to spend most of the hire at anchor rather than moving.
Because the run is so short, a three-hour hire is effectively three hours of sitting somewhere pleasant. There is no travelling to write off.