I'm getting ready to head out on a week long hike through the Sierras, Mammoth to Yosemite. I'll be lugging my D800E along with my 24-70 2.8. I'm thinking about renting something a bit wider to go along with it and was looking for some suggestions. Since the D800 and 24-70 already add a significant weight issue, I was considering a prime to keep the weight and space additions to a minimum. I'd appreciate any thoughts you all might have on the topic.