I love to shoot HDR. By the way, the only trek leader I have been with who truly understands and does HDR is a Nikonians named Winston Hall. All of the other trek leaders I have traveled with have a general understanding of HDR, but do not shoot it.
Lately, I have found that the D800e has such a wide dynamic range that I can dispense with multiple images for over 40% of what used to be mandatory HDR with a D300. Great stuff!