April is, in my opinion, the best month to fish inshore in the flats and back country. Spring tides are flushing bait from the banks and making navigation easier. The strong winds of March are calming down and the temperature is comfortable.
The main target species are redfish, trout, and snook although many others may be caught like flounder, sheepshead, mangrove snapper, and Spanish macs.
Look for trout to be on the grass flats in 3 to 5 feet of water. Try live bait such as shrimp or small pin fish under a popping cork or Cajun Thunder. If you prefer lures or can't find bait, try a suspending twitch bait like the MirrOdine 17 MR or a soft shrimp imitation from DOA or Gulp on a 1/4 oz jig head.
Redfish action is great this time of year. Some people say "where there's mullet, there's redfish." While there is some truth to that, I think "find the rocks and you'll find the reds" is more accurate. Rocky points and oyster bars are favorite hangouts for many fish. Fish the back side (down current side) with shrimp or cut bait such as mullet, or lady fish. To cover more area quickly, try a gold spoon. One with a weed bar like the Johnson Silver minnow will cause you fewer hang ups.
Snook may also be found on the bars and points. I like to target them in creek mouths on a falling tide. You can free line using live shrimp or pinfish. Spoons and top water "walk the dog" type lures are also a good choice. Keep them moving because snook are ambush predators and are used to chasing down their prey.
Be careful out there. If you don't know the area go slow. There are many hazards out there. Well somebody dropped a hat so it's time for me to hit the water.