Lan and I took a trip to Utah over the Memorial Day weekend (end of May) 2005. We saw rocks, a lot of rocks. However, many of them were very pretty.
Utah trip May 2005
On the way
We camped overnight at Kanarraville not far from the north entrance which was exciting if only because it was the first time we used our tent, bought soon after our trip to South Dakota in 1996! We weren't really prepared for how cold it was at night.
Zion National Park
The crush of people has forced the Park Service to ban private vehicles and introduce buses instead which works wonderfully. At Zion, you are in the valley looking up, way up. I think it is 2000ft (600m) down from the land outside the park and much warmer. Too warm in fact; July and August must be unbearable.