Thanks!
I've considered Covington but the way to handle it would need a lot of thought, most notably how to work the compromise between realism and the game. I broke down and did a quantitative look at what fence distances do/don't work when I started on the 19th century thread, including making "Concentric Park" specifically for these purposes, and I'll include a couple of the relevant screenshots below. This may be overdoing it for this Covington discussion, but it's a convenient place to put this for later use by anyone including me.
Basically, a shift left or shift right seems to put the fielder 10 degrees from the relevant foul line) at a distance of 285 feet or so from home plate, and the "Outfield Deep" shift puts the corner outfielders something like 315-320 feet from home plate at the "left field" or "right field" distances (not "left line" or "right line"), and the center fielder out at something like 350 feet in "center field". So to use the historical dimensions a field needs to be at least 320-325 feet deep at 15 degree angular distance from each foul line and at least 350 feet deep in straight away center. I
suspect that any ballpark that meets those requirements and doesn't have crazy jogs in the walls will work as-is, and the grid can be set to keep outfielders inside the park.
A ballpark not meeting those requirements (SF's Recreation Park and Sacramento's Hughes Stadium, to name two that are in this thread) will end up with one or more outfielders standing outside the walls in the street (SF) or embedded in the outfield stands (Sacramento) as the ball is being pitched, only to rush through "solid" objects Kool-Aid Man style to make plays. For SF I didn't realize that was going to happen, for Sacramento the requestor didn't mind.
All of this is a long-winded way of saying that Federal Park in Covington is in my opinion unworkably small as-is--194 feet to the RF line, 218 feet to the LF line, and 267 to dead center. A Covington park that is increased by 80-100 feet in all dimensions would be workable, if you just wanted something that was reminiscent of the real-life park but weren't trying to be terribly accurate in how it looked. The simulation aspects of the game including park factors are divorced from the park models anyhow, so maybe that would be good enough for you?