IRT the Grand Canyon, depending on how much you want to see, plan on at least a day. I was in AZ in July 2015 and the GC was one of my stops. We spent the night outside the main gate (south rim) and was able to get some beautiful sunset photos that evening. We spent the next morning traipsing along the top trails most of the following morning. We drove east along the rim stopping at all the overlooks for more pictures on our way out.
We then headed south to spend the night in Sedona, only to find no rooms available. We backtracked to Camp Verde for the night. This turned out to be a bit of a blessing because the night before heading into Sedona, it was pitch dark and POURING rain so we didn't see any of the red rocks, etc. The following morning was crystal clear and made for a beautiful ride. We stopped and did quite a bit of hiking. After a bit of window shopping and a DELICIOUS lunch at the Hideaway House
http://www.sedonahideawayhouse.com/?utm_source=tripadvisor&utm_medium= we headed south again and stopped in the old town of Jerome.
http://azjerome.com/jerome/gallery/ Jerome is a really cute artsy-fartsy town. It also had a pretty awesome head shop.
We wandered around for a few hours before heading back to Gilbert for the rest of my visit.
Another place to check out not far from Phoenix is the Superstition Mountains
http://www.arizona-leisure.com/superstition-mountain.html and the Goldfield Ghost Town. Be sure to check out the saloon!
Prescott is also a cute town. We stopped and had lunch here
https://www.historicpalace.com/
I have a ton of pics, but I only loaded a few on my FB. If you want to see some, I can get them to you.