I was there on the 4th of July and the water didn't seem low relative to the camp ground area. We fished the creek area that dog legs to the right if you are standing on the boat ramp and it was easily 10-12ft back in there. We were catching Crappie on minnows about 6ft down on isolated stickups. Caught a couple of decent LMB as well.
Don't know how much it's dropped in 6 weeks but I live in Lewisville and don't get out that way much. I saw some nice grass in 6-10' of water.
Have you been out there since the 4th of July?