Before the DW and I went out West for six weeks I realized how lucky we had been not to get a TT flat because I did not even have a spare. But this was going to be more than a local jaunt.
So I bought a spare, got out the 5 ton bottle jack and cut some 2x6 spacer blocks. During the walk-through when we picked up TT the service tech showed me where to set the jack to change the tire. I also made sure I could crawl under and wrestle the F-150 tire. Not easy for an old feller. As an added measure I barrowed a small air compressor from my son-in-law.
Sure enough I had a flat on the TV when we arrived out west. Fortunately, the flat was in the campground. Then on the way home the TT developed an annoying slow leak which became a fast leak while we were visiting a museum. Again, I was able to change it. Certainly not much fun but each changes took less than a half hour. Otherwise I would have been waiting for the road service I pay for.
Both the TV and TT flats were foreign object punctures. Sometimes it is luck sometimes it is preparation.