Double Bay Wharf is a beautiful place to start or end your cruise. The wharf is generally not too busy although the Ferries do use it and have right of way. The Sheaf is a popular bar nearby to continue or start the festivities. There are also a number of nice shops and restaurants just a pleasant walk away.
Generally there is no charge for using this wharf.
There is short term street parking in the surrounding streets and a multi story car park in Cross Street a few minutes walk away.