I love outdoor worship (not to be confused with worshipping the outdoors!) Once a year my hometown church holds church outside. It was terribly hot, but I still enjoyed it. It was comfortable otherwise (love my folding chair!) and I feel closer to God outside of a building. That's a very Celtic concept, by the way!
Here are a few shots I took. The blue tent housed the sound guy. The singers were behind the little locust tree, and the band was to the left in the background. The worshipers were spread out, mostly in the shade where I was! Note the shoes in the first photo. I wonder if the man took them off because he was on holy ground. I admit that I slipped mine off when I saw that! :)