What part of Arizona do your in-laws live in? I have lived here my entire life and the only snakes I have ever seen are the ones in the zoo. I am deathly afraid of snakes so I tend to stay out of the desert during the time snakes come out to warm themselves. We do have beautiful scenery here in our state so I do hope you get a chance to visit. Don't pay any attention to television or movies our spider and snake situation is not what they paint it to be.
My other phobia is glass elevators. I get uncomfortable riding in a glass elevator and try to stay as close to the doors as possible.
I hear there is a glass observation "horseshoe" in the Grand Canyon...
Sitcks out many feet in "mid-air"