Thanks Greenman.
Like Ryan said, get on a map site and try to find quality satellite images of where you intend to fish.
Early in the year , March/April, the fish will tend to be off the secondary waterways.
If you look at the ICW (intracoastal waterway) as the main artery that runs through the backwater, there are "creeks" that branch off of it in many directions but typically towards the west.
What you'd want to do is explore the narrow creeks that branch off those secondary water ways. Narrow, as in you can cast across them on a good throw.
These small waterways twist and turn through the backcountry and have many coves , flats , and even some deeper cuts.
Find one that is directly accessible by land. DO NOT attempt to cross even a small creek. The mud is head high deep. I avoid even trying to jump across. If you were to get stuck it could be a death sentence. The tide may drown you or you might succumb to hypothermia. I've seen people get stuck out there and if there wasn't someone with them to call the coast gaurd they would have been gone. They needed a helo to pull them out.
You may know all of this but I feel better putting this caveat out there for everyone. I've gotten stuck pretty good before and it can happen to anyone.
So once you find your fishing spot there should be a little bit of current flow and it's know time to work all of the creek bends , small coves (minute indentations in the marsh), and creek mouths. Make long casts as well across the creek and try to hit the other side (right at the shoreline). Many times the fish will follow the plug/soft plastic halfway across and smack it hard once it's almost to the other side. There is no telling where fish can be as they are often traversing the area , going from feeding spot to feeding spot.