Hey Lance,
Excellant trip report and enjoyed the photos from J. I should have been on this trip too but have not fully completed my cert yet. Soon!
Your concerns about the SMB suspension were same as mine. You just need more bump travel in the front and hyd stops may help, but be careful as there is very little clearance between the pumpkin and x-member. The dust getting in was a problem for me too. In fact several times I had mice in my SMB suggesting the entrances are large.
I would really appreciate it if the 110 driver pulling the A/T Teardrp would contact me via PM. I am considering purchase of the same trailer and would like to hear about his experience.
Ace