Body damage is normal on this trail. Not at all unexpected. A short wheelbase has the best chance, but anything with much of a rear overhang is going to get tagged several times. You are really lucky your insurance covered your "butcher's bill".
There are many interesting features of this trail, including the 6 week window to run it. Once the first snow flies, it's time to go home, because on the part above 10,000 feel it can snow 60 feet.
We ran it one year the last part of July and had to clear a couple of downed trees fully across the trail. The forest service does a heroic job doing this in the late spring/early summer, but they must have missed one. One year there was a freak wind storm that brought down 300 trees just past Lack Camp Lake-I was surprised that could be cleared at all.
And, the 4 wheel drive club of Fresno not only built this trail in the late 1950s, but has maintained and improved it ever since. Without them, this trail would have been incorporated into "Wilderness" years ago and lost forever to motorized travelers. I hope all will continue to respect that effort.
Last time through in my FJ60 I caved a door fully in, bent the roof rail flat on about a 6 foot section of my roof, and crushed one of the rear quarters. I think from now on, I'll do it in my FJ40 where the damage has been much less.
Some mandatory rig mods for Dusy:
1-Good attitude
2-35 inch tires, including a good spare
3-Lockers on both ends
4-Winch
5-Lots of extra gas
6-Serious gear reduction
7-2 days of extra food
8-Common spares, but especially drive shafts and axle shafts
9-Good electrical (I had an engine fire my first year on Thompson)
10-Good attitude