check out some of the local kayak clubs on line
Lafayette kayak fishing club:
http://lafayettekayakfishing.com/
Bayou Coast Kayak Fishing Club:
http://www.bckfc.org/forum.php
I am a member of BCKFC and if you join, there is a Google map page with many launch sites. The members of BCKFC are always willing to show newbies around. Most aren't too secretive about their spots unless there's a tournament coming.