John,
The section of the trail coming back down from Bishop Pass to the JMT is a very nice section of trail and the last section that you are concerned about is a well graded trail and not steep. I’ve been over Bishop pass a couple of times and find it one of the most enjoyable sections of trail I have hiked in the Sierra’s and I really enjoy the views you have of Le Conte canyon as you climb up or come back down to the JMT.
Mike
