Welcome to RTA!

Everyone's thoughts will be different, but this is what my husband and I would plan:
Bryce - 1 day
Zion - 1 day, 2 if you want to do any hiking
Grand Canyon - the North Rim accessibility will depend on the weather. South Rim is year round. I'd allow at least one day!!!
Yosemite Valley - at least a day
Then you need to plan driving time. About 6 hours from SLC to Bryce. An hour or two between Bryce and Zion. A day to the GC from Zion. GC to Bishop, a day. Another day from Yosemite up to SLC.


Donna