I just installed a 12' gate at the end of our driveway, so now we can drive straight thru, make an easy U-turn into our barn's east end and drive straight out the west side and through the old gate and onto the driveway.
Our floor is decomposed granite that packs hard and I've got 2x12s that the tires sit on.
For some reason we have no mice in that RV barn or the hay barn or stalls. In the house, yes. But not down there.