Anywhere in the vicinity of the air shows with a good view gets crowded. Plus these are desert areas, not hilly locations. The hills are miles away.
I have been to lots of airshows over the years, my Dad used to take us kids to some of them in San Antonio, Texas. As I became a professional aircraft fabricator in my 20s I have been to lots of airshows since then including some in British Columbia, Canada. . But my favorite will always be the big EAA Fly In Show in the summer months in Arlington, WA. We flew our little Cessna 150 into the show a few times in the Mid 1980s. Other times I drove there with a friend whose cousin was a vendor there as a Husky Airplane dealer, his home base was in Idaho Falls. Always lots of old restored War Birds at that EAA event that participated in the aerial display part of the show.
So for a number of years airplanes were a daily part of my life but not so much now. But unlike some people I do not mind camping near small airports. But I am still penpals with my Cessna 150 partner. He lives on the island of Malta. At 90 he is no longer flying but participates as a volunteer at their air museum giving restoration advice as well as doing inspections.