I also added a Tire Plug Kit to my Viair bag. If I have to, I can plug it, then fill up the tire.
Oh yeah. I can't remember the last time I had to put on a spare. Just plug the tire while it's still on your rig, inflate, and go. Pretty standard repair here in Alaska, and for good reason. It works well. A plug kit isn't likely to cost you as much as a single tire repair in a shop, yet it's good for many repairs. Replacement plugs and cement are even cheaper and readily available.
Funny thing, for every tire of my own I patch, I do at least 4 or 5 repairs for others folks with flats found alongside the road. Most notable repair was 2 flats at once on our 4-horse trailer.... With horses aboard. Didn't even want to think about unloading 4 horses and corralling them while I jacked up the trailer, and I sure wasn't going to jack it up with restless 1300# horses aboard.
You'll be especially glad to have a plug kit if you ever have two flats at once, but only one spare!