We have three great campgrounds in Williamsburg -- all within minutes of the Colonial National Park, Jamestown and Yorktown. Best way to explore is to go to the visitwilliamsburg site http://www.visitwilliamsburg.com/book-lodging/campgrounds/index.aspx
to see the listings so you can compare. There is also information there about great fishing, kayaking and hiking, as well as sailing in the York River. Have fun!