I would say that they almost would HAVE TO have some sort of shuttle service but this airport is such a maze of corridors and dead ends that your guess is as good as mine as to where that might be.
The security was at least friendly this time and I think that has recently changed perhaps due to bad press regarding how abrasive they were in the past. Other times that I have returned to the USA they were downright mean to everyone without reason, so I was happy to see that they were at least making an attempt at being kind.
That is good that they had a better attitude! It's so good you had plenty of time to get from one area to the other. I can't imagine how much of a nightmare it must have been. Getting ready to read your new post right now.