Sorry, I meant to say Mount Zion is not too far from Las Vegas. We did not do Bryce Canyon due to lack of time. Best time to go is April to June. There may be some snow left in April but the daytime temperature is around 70-75 deg. F, coolish in the morning but awfully nice in the afternoon. Plus it is not as crowded.
Never like Las Vegas. It is as artificial as you can get in contrast with the natural beauty of Grand Canyon and Mount Zion.