My familiy and I just camped at Wiliamsburg KOA for 3 days. The campground was large and clean. We had a site at the end of a row that was spacious. The staff was nice and  courteous. They seemed to patrol through the campground periodically and were trying make sure that campers followed rules of the campground, pool, and other amenities. They did not go through very much at night, which resulted in us being woken up at 1am to a party a few sites away. 

The wifi at the campground was great, best we have ever had at any campground. Cell service with ATT&T and Verizon was hit or miss. Major attractions are pretty close by, a well as numerous food options an breweries. Overal this was a great experience at a great KOA, we will go back in the future.