I've fished Grayson with an uncle who lives 30 minutes from the lake. I had real success on a Rat-L-Trap in chrome with a blue back. Next thing I used was a blue & Black Jig with a paca chunk attached as a trailer. As you put in at the State ramp, go up the lake till you make a big right hand turn. There is a cove off the on the left side and a creek channel flows right down the middle iof it. Right now the bass should be holding on the edges of the channel or close to the secondary points. Throw a floating stick bait close to the bank and work out on both sides, then repeat with a jig. Next go on up the lake and then try the 1st hugh cove that goes back tot he right. there is some standing timber in it and try around that area.

Good Luck