I goofed on editing my post earlier and this didn't show up...
The east and west ends of the lagoon are more grassy-banked and have more shore structure. I've only fished the east end before, but I can attest that the grass holds shrimp (which can be cast-netted for bait), which draws in reds and specks. The salinity of this water will be lower after rains, since it's the farthest from the pass to the gulf, but the area seems to hold fish pretty well.
The canals and cuts in this area (and any others you can find) hold a lot of smaller baitfish and lots of crabs, so they are a good spot to catch bait. On high tides, larger fish will get up in those shallows, too.
Last point - be sure to rinse your boat well inside and out, and flush everything out, once your trip is done. You can see some of the minor damage to aluminum boats that comes from use in the salt over on sites like
www.tinboats.net - you might want to review posts over there about proper care of an aluminum boat after use in saltwater.