I don't know every county I've been to.
When I started tracking this I was in my 20's. I began with the counties I lived in and the ones I remember that I slept in (visiting relatives, vacations, school trips, etc.). I then added the counties where I remember we visited someone or something, but didn't sleep there. If it took a drive to get to a destination, I assumed that we took the most direct route and determine the counties we passed through.
If you do that it will be a pretty good map to start from.
I'll be down in southern IL today looking at parks in the eclipse zone. I expect to add two or three counties, and change the status of others.
I could get a mostly accurate map just from thinking about my own memories, but there's a few I would miss.
