I'm new to RVing, but I have driven tractor trailers for over thirty years. In an 18 wheeler I was required by law to carry a spare tire. That said, I would not travel without a spare required or not. Keep a good 12 ton hydraulic jack in a compartment (they are small) and if possible mount the spare in the frame rails so not to use valuable compartment space. Even if you are not capable of changing the tire yourself, you will have everything that is needed for someone who can. Don't forget to check the spare before any trips or at least a couple times per year. A spare with no air won't help you much.
Jeff & Rini, Chazy, NY
2012 Winnebago 33C Sightseer, Ford F53
2012 Chevy Silverado (toad)