places to kayak/swim to manatees in Crystal River, FL without boat?

Taking the girlfriend up to crystal river for the weekend to catch the end of the manatee season, I already booked a boat tour to snorkel with them but I was wondering if there was anyone in the area that knew a place where you could swim to them from shore without having to take a boat. Still going to do the boat trip just figured it would be a fun thing to do the next day. Thanks for the help!