The Bighorns are among my favorite places to go. I have pulled the toy hauler in my sig up and down route 14 several times over the last two summers. As fate would have it, on my first trip with it, I lost the brakes in my truck when my exhaust mount snapped and the hot exhaust pipe fell onto the brake line that crosses the rear diff and melted it. But, the Good Lord was watching over my family and I: I was going uphill at the time it happened. Since, we've had no issues.
You do want to be deliberate and thoughtful as you come down, but the area is worth it. One thing I really like about the Bighorn NF is how clean and squared away the campgrounds are. Also, there are so many great places to boondock that you can easily find a nice spot if you prefer to camp that way.