You said a couple of hours? Clark state forest has a decent outdoor range. Off the 65, about 1/2 hour north of Louisville.
$5 a day.
Outside, no staff onsite.
Plus: you can do whatever you want.
Minus: the idiots around you can also do whatever you want.
I haven't had any bad situations come up, but I have seen some dudes that look like antifa wannabes show everyone how badly they shoot.