The lake level is pretty on par with where it was in 2009, it will have plenty of water for the poker run on the 16th

http://travis.uslakes.info/Level.asp

If you pay attention to the shoreline it's obvious where the shallows are, just stay in the middle or on the side with the steep shore.

Mansfield is a decent ramp and pretty convenient, but it's always amateur hour there. It closes at 630'