I was doing some research for my upcoming road trip and I had a horrible thought when I looked at the Hoover Damn's tour information I realized that there are no pets allowed.
Hoover Dam info
I'm not crazy about leaving the dog alone in the car for anything more than 5 minutes and when the vehicle will be within sight. Leaving doggie in the car for 1-2 hours in a parking structure is out of the question.
Upon further research, I also found that the Grand Canyon has a kennel and does allow dogs in the park above the rim, just not in the buildings or below the rim - which is fine, I really didn't plan to do more than walk around and take in the view anyway.
So, with that being said, feel free to move this post if it is mis-placed under Summer Planning because it may apply to any time of year. Also, if anyone has anything to add on traveling with pets...I guess it was naive but I thought anywhere outdoors would be fine, but obviously that's not the case and I'm glad I checked or I would have gone pretty far out of my way for nothing.