That's good. From your first post I was worried that you were coming specifically to see Tombstone. Tombstone is cool, but if that was the sole purpose of your trip, it would have been a waste. Like taking a trip to Disneyworld just to ride the Teacups. If you're in/around Tucson for a couple days, there's the Pima Air and Space museum, which is awesome, the Titan Missal museum, which is pretty cool, Colossal Cave is just outside of town, and the Desert Museum (the country's first zoo with all the animals in their natural environment). Old Tucson Studios is kinda cool too, but a bit redundant if you're also seeing Tombstone.
And of course, there's also that big crack in the ground up north, if you want to drive that far. And on the way to the big crack, there's the big dent.
Wherever you go, if it's soon, be aware that it's monsoon season. A ton of rain can come very hard, very fast. When you see a dip in the road that says "DO NOT ENTER WHEN FLOODED", do not enter it if it's flooded. Bring some extra food/water in case you get stranded between washes.