Scariest thing husband and I ever had happen with animals and cars was back in 1979. We decided to take husband's car, a tiny, 69 Datsun (Nissan), up to Maine to do some camping. We were headed back to our campsite after picking up some groceries, when we came upon a mama moose and twin calves in the road. We stopped. Hell, we could've driven UNDER her.
The calves were sort of dithering around in the road. Mama got upset and started making warning charges at our car. We sat there with the realization that if mama got serious and attacked the car, we were both dead. We sat there for twenty minutes while this cow moose bellowed and snorted, and tried to chase her idiot calves into the brush on one or the other side of the road. Finally both calves exited on the same side of the road, followed by mama, who gave us the hairy eyeball until she disappeared into the brush.
It took a bit before we were able to proceed. If no-ones ever been up close and personal with a cow moose, they are nearl y 7' tall at the hump and weigh close to a ton. The bulls are even bigger.
My nicest encounter with wildlife on the road was outside of Eagle River back when I could still drive in the dark. I saw what I initially thought were two malamutes on the the side of the road. Got closer and realized they were too big and not furry enough.
It wasn't until I spotted the radio collars that I realized that I was looking at a pair of timber wolves. I slowed down and pulled wide, and they trotted alongside the car for a bit, as if it was a game of some sort.
Then the pair left the road, I heard howls in the distance and the pair answered. Sent chills up and down my spine. I pulled off for a bit on the shoulder to listen to the pack talking to each other. It was starting to snow, and as I sat there, a female snowy owl ghosted overhead.
I felt welcomed to the Northwoods.