Manatee Springs SP is a prime location to spot Manatees but they have a short run to the Suwanee River and the park rangers will not let you put your boats in if there Manatees are near in the run or springs. The same is true at Blue Springs where the rangers we positively extreme about no boats or swimmers with Manatees. At Manatee Springs, which has two nice cg, you may be able to carry your kayaks down to the floating dock to launch them. There are big fines for interfering with the critters.