Grand Canyon North Rim, Zion, Bryce Canyon

Farmbone, I'm with you. We no longer do the Chevy Chase vacations. We try to stay at a place 3-4 days least, as you say. That way you really enjoy the place and don't feel like you gotta go back there because you missed this and that. We went to North Rim of GC only for a day. Drove all the way from South Rim where we had been hiking. I would definitely stay there longer than one day. Beautiful. North Rim and Bryce will be much cooler than Zion. Zion will be HOT in August. We camped in the Park and rode the bus a lot. Be sure to hike The Narrows. It will be crowded, but keep going past the crowds. We went about 6 miles and then came back. Wear some old sneakers or shoes that can be wet and take hiking pole. We have been to Zion twice and it is OK, but we preferred Bryce (also 2X) so I would spend more time there. I would avoid that tunnel at Zion with fifth wheel (we did not have our 33' fifth wheel when we went there). We are avid hikers. There was a gorgeous long hike at Bryce which I can't recall name of. Maybe Fairyland Loop???