When I was guiding on GV, the middle of the summer was what I looked forward to, as fishing was so good. Since I stopped guiding, and only fish the lake occasionally, I will fish the north (Flower Mound) side in the summer. The south (Grapevine) side has some great summer fishing but you have to know where to fish. Go the the north side and graph along the shoreline staying in about 15-20 FOW, and watch for rocky dropoffs....and there are LOTS of them. The crappie will hold at the thermocline depth on these dropoffs. Working a jig up the dropoff can sometime send you to the doctor to get you arm joints repaired. They will knock the poop outta a jig doing that. Hope this helps and good luck..........