I visited Bryce Canyon on May 13. The park shuttle driver said I picked the perfect week: there was snow until the previous week, and the weather was cool and pleasant, in the 70s. It was more touristy than I'd like, but not nearly as bad as Zion. I hiked the Navajo Loop and the Peekaboo Loop as a figure 8 but skipped the portion of the Navajo Loop known as "Wall Street" because it was closed. I started and ended at Sunset Point. If you do any hike from there, be warned that the hike out of the canyon back to Sunset Point is a killer.
Bryce is gorgeous and worth a trip, but I don't think it's worth more than about a day unless you are a geology nerd or have some big plan that goes beyond the more popular parts of the park. A different hike that is very popular is the 8-mile Fairyland, and the hike I did can be extended to include the Queens Garden. However, after 5 miles of hiking around the beautiful hoodoo rock formations, I'd had enough. I decided to head to Zion the next day instead of coming back to Bryce for more.
One single, beautiful columbine. I don't love the pic I got of it, but I love the flower.