Riley said, "My thinking was that I should get land that is very close, or right up against (I'm sure that's near impossible by now) a large national park. There are some decent sized state and national parks in Kentucky.
If it is your desire to locate near state and national parks then why not locate those now so you will have a good idea of where you want to relocate to?
Are there any within 30 miles of your current job? I use 30 miles as a good number of miles to drive to and from work. Further than that is a hardship.
A simple search can be done by asking Mr. Google "state and national parks near Louisville, Kentucky".
I did, are you familiar with any of these?
Google said, "Abraham Lincoln Birthplace & National Historical Park. ...
Big South Fork National River & Recreational Area. ...
Camp Nelson National Monument. ...
Fort Donelson National Battlefield. ...
Mammoth Cave National Park. ...
Mill Springs Battlefield National Monument.
Start visiting the parks to see if you like the areas and would want to live there.
While you are there get the names of the local real estate firms. You might even talk to some to see if you want them to represent you when you do buy land.
Best wishes for your land search.