Bass Lake is a nice lake. As was stated, small. We used to go there every summer for two weeks. I learned to ski there behind a 16 ft Tahiti with 100 HP Merc.....
You may also want to consider Shaver Lake which is ~60 miles NE of Fresno off of HWY 168. Bigger lake than Bass. Since it is higher it will also be a little bit cooler than Bass. After we stopped going to Bass we started going to Shaver for two weeks every year. So. Cal Edison owns the whole forest up there and they have a real nice campground on Shaver Lake that has plenty of pull-thrus. some of the sites are even on the water with hookups.