We're hoping to be leaving Friday as well, our plans are to cruise up the back way to Crown King, through Prescott and find our way to the night zero camp by Saturday night. We may add some other dirt sections in there if we can figure something out.
Of course this all depends on us finishing the trailer and getting all the shopping and packing done before then.
I wanted to get a test of the trailer somewhere closer than the North Rim, that way if necessary I can come home and address the issue and head North late, but with a functional trailer...