This is the trip my wife and I are planning in October. Any tips would be appriciated. We do like Craft Beer bars, found one-Zion Canyon Brew Pub.
We have been to Las Vegas many times and have seen all the things around there like Hoover Dam etc.

10/8 Arrive Las Vegas 9am. Pick up rental car with all-wheel drive (in case we come across snow later on). Go to sporting goods store for bear spray. Go to Walmart for bottled water and road snacks. Drive down the Strip, and past the Sphere. Drive to Williams AZ (have an AirBnB north of town for 2 nights) with a stop in Oatman to see the donkeys.
5 hours driving time
10/9 Meeting relatives in Williams and going on Grand Canyon Railroad-3 hours at South Rim-back to Williams for dinner.
10/10 Leave Williams for AirBnB in Hurricane, UT - see what we can of Zion National Park
5 hours driving time
10/11 See more of Zion if needed - drive to Bryce Canyon then stay at AirBnB in Alton, UT
2 hours driving time
10/12 See more of Bryce Canyon if needed - leaving this night open for drive to Yellowstone stay somewhere along the way
11 hours driving time broken into 2 days
10/13 Drive to Yellowstone Old Faithful Snow Lodge for 2 nights-see some of Yellowstone
10/14 Full day of Yellowstone
10/15 Leave for Little Big Horn Battlefield - stay at AirBnB in Hardin, Montana
5 hours driving time
10/16 Leave for Mount Rushmore and Crazy Horse Memorial stay in Rapid City
5 hours driving time
10/17 Leave for Denver - leaving this night open to stay somewhere along the way
6 hours driving time broken into 2 days
10/18 Be at Denver airport by 3pm for flight home

It's a road trip alright. It's pretty full on.

10/10 Leave Williams for AirBnB in Hurricane, UT - see what we can of Zion National Park
5 hours driving time

I assume you realize you'll be backtracking to Hurricane (about 30 minutes from Springdale) if you visit Zion on your first day in the area. Have you considered staying closer to the park?

I also assume you know that you need to take the shuttle from the Visitor's Center near Springdale into Zion.

https://www.nps.gov/zion/planyourvis...tle-system.htm

You've not left much, if any, time to hike some of the wonderful trails in Zion and Bryce. Maybe no interest?

Springdale, even if it isn't an AirBnB, not Hurricane.

Also Kanab is 90 minutes from Bryce and 90 minute from Zion. We have enjoyed staying there.

My one tip is not to be so dedicated to AirBnB stays when a hotel saves you time.

"My one tip is not to be so dedicated to AirBnB stays when a hotel saves you time."

Ditto. Especially for one-night stays. Most chain hotels offer a free breakfast with the room which also saves time.

Mel, might it make sense for Bindery to add a visit to Cedar Breaks?
I am done. the end

Personally, I wouldn't add anything to this already full on trip.

The reason I am using AirBnB for some of the trip is to be out in the country and to be able to sit outside and see stars away from city lights.
When I travel on trips lilke this I usually use Hampton Inns for one nighters, and I have one reserved in Rapid City.