Roger that jchief!
The Southwest Louisiana National Wildlife Refuge Complex Fishing Regulation pamphlet put out by the U.S. Fish & Wildlife Service for recreational opportunities at the Hog Island Gully Area states, "Non-motorized kayak, canoe, pirogue launching into Hog-Island Gully Canal east of water control structure for recreational paddling only" is permitted from October 16 to March 14.
Boat launching at Hog Island Gully is permitted from March 15 - October 15.
An online pamphlet may be found here:
http://www.fws.gov/southeast/pubs/SWLAcomplex_Fish.pdf
Permitted activities + open season/time for specific recreation areas (Hog Island) can be found on page 13.
Hope this helps,
Tom