August is not the ideal inshore fishing time for the bay, but you should do OK on flounder, bluefish, and bottom fish like croakers. Some gray trout/speckled trout might still be around too. I'd rig up with bottom rigs with just enough weight to hold bottom, flounder rigs, and throw some grubs around marshes/deep sloughs. Green,white, and red are the good colors. Use fresh shrimp or squid on your bottom rigs, and SMALL hooks. If you pass a bait shop on the way down, stop in and buy a couple of things and ask what's happening. Most are glad to pass information.
Flounder like to move up and down bars with the tides, so if you have a sand bar nearby work it hard. On the fluke rigs I like to use live minnows. If you have a minnow trap bring it with you and put some shrimp in it as bait, throw it up against a marshy spot and you'll get baited up quick.
Make sure you bring a length of rope and an anchor of sorts to keep you in a good spot....don't need that much weight in a canoe (I use 1/2 a cinder block in mine).
I could go on for DAYS!
Best advice of all, take a kid with you! Fun for both, and the fishing karma seems to favor the inclusion of young 'uns!
Hope this helps!