I am headed out shortly to Utah to see Yellowstone, Deadhorse State park and the big five national parks before too long and I am looking for any tips you may have to offer. I plan on taking my D500, Sigma 10-20mm, Sigma 17-50mm, Nikon 70-200mm with a 2x extender and finally my Tamron 150-600mm in case I get to see any critters or large animals. My buddy has a tripod that I can use because we are flying out. All suggestion are welcome and thanks to those who respond.