Those who know Jack know that he is the consummate ham. Point a camera at him and he starts posing. Where this comes from I have no idea-- except perhaps that I give him a firm "Whoa!" when he is in a position I like for the camera.
He was in heaven on our Wyoming trip. The terrain suited him to a T-- from really icky bogs to rocky mountain trails with huge boulders to scramble up and down.
The only feature we were unable to find on the last trip was a nice stream for Em to play in and me to walk in looking for "mountain water" to photograph. That will be high on our list for the next trip.