Oh, I meant "Casper, Wyoming," not "Calgary, Alberta." I did not realize that the short-circuit in my brain caused my fingers to type the wrong words. That is not exactly a joke, I sustained a head injury in '93 and it does make my fingers make spelling mistakes and even correctly spell the wrong words, too.
I use the "short leash" complaint that Jack has when the guys are last seen together as part of my argument for Ennis setting up the meeting dates. If Jack had been able to share in the decisions, they would not have always had to have those high-altitude encounters where they would not be seen by others.
While there is a certain spirituality throughout the story, in both the book and the movie, I would not make it comparable to the Eden story in the Bible.
Since Brokeback Mountain was on open federal land in Wyoming, Ennis could have chosen to go back up there for a meeting. Apparently Brokeback was not a single peak type of mountain but a very wide one with several peaks.
IMO, Ennis was afraid of going back up to Brokeback with Jack; but, I doubt that Jack would have cared. But, Ennis substituted other mountains as stand-ins for Brokeback.
Jack did complain that all they had was "Brokeback Mountain;" other than that, neither of them actually had a life.