The place in Occoquan is Mom's Apple Pie Company:
http://www.momsapplepieco.com/locations/ . Their pies are pretty good, but not as good as I was hoping.
The best pies I have ever eaten came from High Hill Country Store in Round Hill, VA. I think I am going to make the drive from Springfield, VA this weekend to buy some of these pies for Thanksgiving. They are worth the drive. Soooo good!