Something that makes a map feel empty like nothing else does is a lack of small game.
Nez Perce is my favorite map and the one I've spent the most time on since buying tbe game but it really does lack small game, Turkeys added a huge improvement but they're not exactly spread out enough to make it feel like it really should. Here's a list, in no particular order, that would help add a little more life.
Grouse
Jackrabbits
Coyotes
Raccoons (kinda surprised how many there are out here if im honest)
Fishers (kinda hard to find but they're impressive animals)
Porcupines
I know squirrels might be way too much of an ask, but theres several species in the area Nez Perce is set in and they all make great table fare.
Let me know if you can think of some others, i hope we can get one or two of these though.