The Data Doctors Project Spreadsheet has the definitive source for state dates. We are in the process of adding documentation to the project.
Please use the US state locations by dates listed in the United States Historical Place Names.
This also is the source for the US too early suggestions.
Canada Historical Places are here.
We will add the info to the pages on Help and others as well.
West Virginia is near and dear - my dad and several generations are from there [Virginia before 1863 ].
Please contact me directly if you need anything else or have other suggestions for the Data Doctors Project and locations.
There are suggestion reports for states done weekly already. Let me know if you want to see them for West Virginia and/or Georgia.