Great trip and story!
Back in the late 60's to about 74', I spent a couple of weeks each year in the area with my dad and grandpa. I was between 8-14 at the time, and wish I could say I had been back, but I have not since grandpa passed. One of grandpa's Army buddies families owned a large ranch near 6 Creeks off Flint Creek Road. We would stay in an old bunkhouse and drove a early GMC PU with a Napco 4X4 conversion all around the area, spectacular, but I did not appreciate how much so until much later. Unfortunately, the family borrowed some money and lost the ranch in the early 80's. It was, and appears still to be, a remote and special area.
I was in SE Oregon earlier this year, and looked longingly at a map of what lay to the East...Someday...Someday soon!