Do you carry a spare tire?

I am a new RVer. I have a new RV with new tires and went on my first long trip carrying a spare that I bought myself and that matches my other tires. I also have a Tire Minder pressure/temp monitor. On this one 3000 mile trip I picked up a self tapping screw in a rear tire (at a KOA) which my monitor warned me about after I had lost 10 psi. I was able to drive and have it repaired with out issue. I then found a gouge out of the sidewall down to the belt on another rear tire and had it replaced with the spare, again without issue. Because it was a good quality spare I will just leave it in place and replace the spare.
I will never travel without a good spare.