We (DH, DS1, DS2 and me) loved the GC, spending the whole day there hiking. If you do the GC, you’ll want to spend some time there, so I think it would be best to skip it this time around if you’ll spend so much time on the bus. The day before we went to the GC, we visited Petrified Forest National Park and Meteor Crater. The scenery in all these places is breathtaking. They sound like they will be out of your way on this trip, though.
We’re big on hiking, so every place we went we found a hike to do. We all wore new, comfortable trainers (called sneakers in the U.S.).
Have you booked your Vegas hotel yet? In most of the hotels, the lobby is one big casino, and security is very strict about letting children even stand in the lobby/casino. The gambling age is 21 and older, and when I went in 1998 (no kids at the time), I saw security guards telling families with small children to move along.
Consequently, when we went in August 2014 with our children, we booked a hotel that did not have a casino as a lobby. It was only a block from The Strip, so well within walking distance.
Two days in Vegas is plenty. The second time we went, we first visited Hoover Dam (it doesn’t sound like you’ll be able to get to this on your trip) and rolled into Vegas around dinner time. We walked Vegas in the cool evening, which by that time was around 80 degrees Fahrenheit (about 27 C). During the day in August, it’s too hot to do anything but stay by the pool, since you can’t hang out in casinos with the children.
My older son said his favorite part of the trip was Las Vegas. It’s very impressive at night.
We drove through Death Valley from Vegas to Yosemite. Death Valley was about 115 degrees Fahrenheit (46 degrees C), but again, this was in August. Getting out to stretch our legs and do some (very quick) sight-seeing was excruciating. Still, I loved the scenery. Amazing. If it was cooler, we would have spent more time outside. We loved Yosemite and did a couple of hikes there. It was one of my favorite parts of the trip. Monterey was cloudy when we were there but the scenery is beautiful. There was a car show when we were there.
San Francisco can be cool, even in August – I was surprised. We rented bicycles and did a bike trip around the city. About a month before our trip I remembered Alcatraz and when I went online to see about booking a visit, it was sold out. I’m still kicking myself. If you are thinking about Alcatraz, I’d look into that now.
I live on the U.S. East Coast, but I absolutely love the West Coast, by far the best trip I’ve ever been on. Every single locale we visited was special in its own right and I loved it all. I’m hoping one day we can get to Zion National Park, Bryce Canyon, and Lake Powell.
May is a very good time to go. Enjoy your trip!!