You don't have to go out at night. Start checking the faces of little draws. They prefer soft dirt, and often a southern exposure. Just look around as you ride.
They do travel at night, though, so the den may not even be very close to your place.
There isn't many places for them to go as it is very agricultural around here, and has clumps of houses. My neighbor has a small woods (I mean SMALL) so they could be in there, but I have no idea. I will probably check the banks of the creeks for footprints