Lake Vesuvious does have big bass but it will be the only fish you catch that day. Two years ago, my fishing buddy and I went to Vesuvious maybe 14-15 times. Only two fish were caught but they both were 5+. Grayson has also produced some 5+ the last few years but just like you said, you will catch 10 dinks to every 1-2 # fish. I mostly fish at Yatesville in Louisa. Although they are also full of dinks, the odds of catching a keeper bass is higher in my mind. We have caught more 2-3 pound fish from Yatesville and it also can yield a 5+ bass. The only problem with Yatesville is high fishing pressure. This pic is one of two 5 # that he caught at Vesuvious out of many days of fishing there