Here are a few maps I use for researcing places to hunt...Hope that you can use them to find new sites!
http://www.historicmapworks.com/Browse/North_America/
http://www.digitalhistory.uh.edu/maps/maps.cfm#revolutionary
http://showmystreet.com/
http://usgwarchives.net/
http://mapper.acme.com/
http://www.historicmapworks.com/Browse/North_America/
http://www.digitalhistory.uh.edu/maps/maps.cfm#revolutionary
http://showmystreet.com/
http://usgwarchives.net/
http://mapper.acme.com/