Update
To get the pics in I split up the post.
All packed and on the road headed back home. The axle had held up but I was already planning on the proper fix. We were cruising on a main road with a hill wall on one side and a river down below on the other when all of the sudden I saw Clint anchor the brakes. I followed in kind and 2 seconds into my braking a heard a loud bang come from the rear end of my truck. There wasn't anyone following me so my first reaction was that my axle tube just let go. I let off the brakes for a split second but seeing that I was approaching Clint rapidly I had to stop so I anchored the brakes hoping to scrub some speed. Talking about this afterwards Clint heard my brakes lock up and saw our gap diminishing, he knew I was going to hit him but what I didn't know was what Clint was seeing in front of him. There was a Honda parked on the side of the road and a truck and trailer turning around right in the middle of the road. The reason he was turning around was that the road was closed with cones immediately in front of him. So I've got my brakes locked, Clint knows I'm going to hit him and he needs to stop before he hits that trailer. As I contact his rear he briefly lets off his brakes to absorb some of the impact and to help get me stopped and then re-applies his brakes to stop us before an impact in front of him.
We hop out and true to his character Clint is checking on both our families to make sure everyone is alright while me pumped with adrenalin I'm checking on the damage.
The folks in front of us come over the see if everyone is alright once they are done turning around and I may have uttered some expletives in my excitement at that time. The bumpers took the brunt of the impact but there was some sheet metal adjustments and finding out later some bolts and mounts sacrificed as well.
Some of Clint's surface damage.
Dora's bumper folded onto the hood and I couldn't open the hood.
When I ran around the back the axle was intact, so what did happen? I then saw the culprit hanging at the bottom of the disc instead up top where it should have been.
The rear disc brake bracket just ripped apart under the panick stop which let the caliper spin with the disc ripping the brake line which in turn rendered my rear brake circuit moot. After that loud bang in the back I was trying to stop my loaded up cruiser from a 5-day trip with my whole family on board with just the front brakes, thus the healthy layer of goodyear rubber left on the road from my front tires.
The interesting thing was that we were on a curve and when brakes lock inertia and momentum would direct you straight which could have lead right over the guardrail and down into the river but you can clearly see the skid marks follow the curve. We believe in God and continue to believe after seeing that.
Another shot where part of the caliper bracket ended up. I was amazed that 3/8" steel could rip apart like that.
Parts rounded up.
The fix. Vice grips to pinch off the line and zipties/bungy cord to keep those vice grips from opening on a road bump. I wanted to at lease have one brake actuating in the the rear. It did pull to the driver but you better believe I left plenty of stopping space on the way home.
We hooked up a strap to the front bumper and bent it off the hood with a tug from Clint's truck so I could get inside to see what damage was under the hood. Luckily nothing that kept us from getting back on the road was found and the hood still opened and latched like normal. The radiator support was pushed back which you can see from the mis-alignment on one of my intake boots but no liquids dripping or critical parts damaged under the hood. Dora was driveable. There were no steering problems either so for the most part Dora weathered the impact well enough to get us home, she just didn't have a pretty face anymore.
So what about signs? There were no warning signs coming up to the set of cones like a road closed around the corner kind of thing. The only sign was found way back at an intersection (~5 miles away) where they weren't even on the road. If the road was closed those signs should have been ON the road. While we were fixing, a construction pick-up drove pass the cones and right by us, didn't even stop to see if everything was OK and when we got to that intersection I saw that he had moved that cone slightly into the road. If that cone had been there in the first place we would have run right into it so I know it wasn't there when we passed by. So at the intersection I jumped out and drug that cone straight in the middle of the lane so that no one else gets that surprise like we did coming around that corner.
The rest of the way home was thankfully uneventful and we made it home safely.
At that point I pretty much parked my rig for the next 4 months while I focused on gathering parts and fixing Clint's rig.