Playa Las Gatas restaurants - boat transportation

I would like to spend another day at Playa Las Gatas and give this restaurant a try after a day of swimming & snorkeling. But this time I do not want to hike the entire beach route there from the far end of La Ropa. I want to take a boat this time. Do I arrange a boat ride along trip from Zihua beach somewhere? Like the pier perhaps?? Can someone please tell me the fare cost and details. Is there a range in prices?? I am just one person and do not take up very much space. Also about how late do they run? (don't want to end up stranded)