http://www.huntinggpsmaps.com/store/gps-maps (http://www.huntinggpsmaps.com/store/gps-maps)
These are pretty fantastic if you use a garmin gps. Started out west, but they're filling in the gaps in the east now, looks like they've just released chips for VA and TN.
These are free:
http://www.gpsfiledepot.com/ (http://www.gpsfiledepot.com/)
I use the maps on that site in my Garmin Dakota 20. They are basically the same maps as the Nat Geo folding trail maps you get.
I just switched teams from Delorme. We use those chips for hunting the public/private boundary out west. Will have to check that site out, because one thing is for certain and that is the Garmin base mapping flat out sucks.