I'm glad you brought this up, Explorer! My brother and I both read the book "The Last Season" (excellent read) quite a few years ago and it stirred us to research whether or not the events described there were related in any way to what we had experienced. We were able to positively conclude that our journey took place in late August of 1995. So it was a full year prior to Morgenson going missing. We even spent one night at Bench Lake in '95 and walked right past the unoccupied camp of the ranger who was stationed there, who undoubtedly at that time was Morgenson. We had chatted with him a time or two in previous years as he had patrolled that particular area for many years
As a side note, our stay at Bench Lake was rather unusual. We had set up camp and hunkered down in our tents that mid afternoon to avoid being eaten alive by the massive mosquito population there. As we looked out through the mosquito netting we saw a procession of perhaps twenty people dressed in immaculate flowing white robes, carrying flowers etc, marching purposefully down the trail to the eastern shore of the lake, this at over 10,500 ft. and a very difficult day and a half hike in! We concluded that it was perhaps some kind of new age wedding or retreat trip for some odd cult. Who knows?
Getting back on track here, Yes the NPS does indeed use helicopters in the wilderness area but it is their policy to keep that to an absolute minimum so as not to spoil the wilderness experience for others. In all the time I have spent in Kings Canyon I can recall seeing just two of them, the one I described in my piece was an unmarked military type chopper. I observed it at very close quarters and it was certainly not one of the much smaller rescue evac type helicopters I had seen previously. The chopper also landed at a barren out of the way area that made no sense whatsoever as a re-supply drop-off or staging area for a possible rescue attempt.
For many years I was close personal friends with one of the summer Rangers who patrolled the Mount Whitney area, just south of Kings Canyon. We never discussed the topic of bigfoot specifically, but I did notice that he would often shut down the conversation if it drifted to anything of a paranormal nature. He would clearly become uncomfortable, tight lipped, and sullen. This would happen even when he was far away from work, visiting at my home. So yes, I believe there is specific training and policy regarding these types of issues and the avoidance thereof.
In my honest opinion though, I don't believe that the wide open expanses of Kings Canyon's high country would offer the best habitat for sasquatch. Most of it is well above timberline which in this area is around 10,600 ft or so. The highest peaks are 13 to 14 thousand.ft. There is little or no cover and most activity can be spotted from as far as a mile away. Its not the best elevation for abundant food sources either. Could they have adapted to life scraping out an existence on the scree slopes and boulder fields? Possibly... but the lush green valleys just west of this area would provide a far more lucrative alternative. .