This is one of the most photographed views in the United States (doesn't crack the top 5 though). It's only three hours from Las Vegas. Typically photographed as a sunset shot, it is so popular that there are places marked for "photographers" on the bridge that I took this from. So taking this photograph on a typical day will not get you a very unique image (unless there is some unusual weather conditions). However, if you are there why not take it? It's still a eautiful scene!
I took this at about mid morning in April. Twenty minutes earlier it was completely overcast, windy and cold. Hence, my collegues and myself were the only ones shooting. I guess we got a little lucky - no fighting for spots. Not the ideal light but the scene was utterly dull before the sun appeared.
One of the best things to photograph in Zion called the "Subway" was too deep in cold water for us to venture into during our brief stay, but if you are in the Vegas area, this park as well as the Valley of Fire, Bryce Canyon, Paria, and of course the Grand Canyon are all worth the drive.