Sorry to see that. Where did he pull out from that he hit you on the drivers side? Was there a full gas can in that can holder that was hit? Did you lose a lot of your trailer contents? Your "No Bad Days" sticker didn't save you from having one. It looks like the other guys insurance should pay.
I rolled my offroad trailer in Baja three years ago. I took a right curve a little too fast , pulled back and dropped my right front tire off the pavement, pulled it back left and ended up fighting for control. The trailer had a mind of it's own and ended up opening up and throwing it's contents all over the road. I was just lucky I didn't roll my truck and camper. My trailer ended up upright so I was able to load it back up and head home after putting on my spare due to a bent wheel. Turned out it was a total also. The Mexican insurance paid but didn't cover the contents (Honda generator, 2 mountain bikes, inflatable boat, ARB fridge, etc).
Good luck! I feel your pain.