Kerr is a very large lake and can absorb a lot of the traffic. Clark Hill Reservoir in GA is like that too, at 75,000 acres.Kerr Lake can be pretty peacful on a holiday weekend, I have found campground areas in Nutbush are pretty busy with boat traffic though. The mid lake area from the dam to Grassy creek is less crowded on the 4th than it is in the spring when theres a bunch of tournaments going on.
I dont mind it being busy myself. I still put in a full day fishing on holiday weekends, I just look at the crowd as additional entertainment and dont let them bother me, theres still fish to be caught.