calcasieu river help

[Keywest18]

Well im about to make my first trip to the river in the next week or so. Ive been lookin on google maps and have found a few places I would like to try but have no experience with the area or if im allowed to fish them. Whether it be private or just shallow/unaccessible. I took a few s reenshots from my phone hopefully someone can give me some input on this. As well as best place to launch. White oak, i-10 or McDonald launch. Mainly its just the little canals/creeks whatever you want to call them off of the main river. The plan is to tjrow some lures early then maybe finish day with some crickets for bluegill

The first picture is a cut right past the saltwater barrier im wondering since it has that opening in the back if a boat can make it in there and is it private?
Second picture is by 171 bridge there are two more canal by it I would also like to know if these are private or accessible?
Third picture is right before the west fork there is a canal on the left and right. I would also like to know if these are private or accesible?
Sorry for all the questions but in MS we dont have to worry about the private property situation