The 2499 bridge that crosses hickory creek/lake lewisville has a parking lot on the east side of the road, just before the bridge.
You can park here and kayak, my wife and I have done it a few times.
During the flood it was quite a hike but the water was up and we launched from under the bridge. I have no idea where the water is now, but I imagine it is a longer hiker than then.
I would check it out and try and plan your route around the path of least resistance before hauling your kayak down one of the random paths.
I couldn't tell you how to fish out there, since I didn't catch any fish out there, but I suck at fishing!