re: Wanting to hit Bryce, Zion, Grand Canyon, etc in one trip in April.

Personally, I’d try to get out of Vegas as soon as possible and I would probably skip the North Rim if you only have a week.

You’re missing Arches, Canyonlands, and Capitol Reef National Parks and it would be a shame that you made it that far without seeing those parks. Coral Pink Sand Dunes and Kodachrome Basin are two state parks that are worth the stop if you have the time and you’ll probably end up driving right past them.

I’d recommend going in October because the weather is nice and cool and the crowds are gone.