You say you do not have any "points", but that would determine on how your defining a point. A point can be land, rock, weeds, etc. I think if you look at your weed line, there are propably some variations in it. Some may be 4ft into the water while one or two sections jump out to 5ft. That could be considered a point no matter how small. If there is an island in the lake, then most likely there will "imperfections" in it. It may be flatter on one side, it may have a deep side, a long side, etc... There will probably be a "point" in one way or another on it. If you can't find points, look for different changes in substrate or transitions. Rock to weeds, one species of weed/grass to another, etc... The bass will use anything they can find as an ambush location. But they also want to expend the least amount of energy when they are doing it. Thats why they use points, or hiding areas, or a stump... Because they can get shallow or deep quickly, do there thing quickly, and get back to a resting area quickly.
As far as swimbaits go, I have caught them in muddy water on one. I usually use it as a back up approach to a spinnerbait when the fish want something a little more subtle. Slow and steady retrieve work better for me in stained water... I would personally find the different areas that bass will use as ambush points and use the swimbait in slow steady retreives making multiple casts to the same target at varying depths.
If you do not have a bite by then, switch to your spinnerbait or crankbait and do the same thing. Then move on to the next target using the swimbait as your primary lure. You have to let the fish tell you what they want. If you don't ask them, they won't volunteer that information.