I've ridden alot in the desert southwest with my dual-sport buddies -- mainly off-highway forest roads/BLM roads and two-track trails across the desert. Through the years, every one of us has had at least one flat -- some, several. The customary culprit is a big ugly cactus thorn. They've all been repaired (patched tubes) and pressurized 'in the field'.
One caution on dual-sport tire selection: some dual-sport style tires are available for "tube-less" use -- some of these have a bead design that's required for tube-less. Sometimes, when these (tube-less compatible) are mounted on some tube-type rims it becomes nearly impossible to break the bead in the field. If you can't break the bead -- you can't patch the tube.
I always choose a tire that has no (zero) tube-less pretentions for my dual-sport bike.
As a side note: the R1200GS is, far-and-away, BMW's best selling (American) model and a huge majority of these are sold with the optional, and expensive, tube-less wire-wheel option (they now come stock with cast wheels). When I inquired about this from those-in-the-know I was told it stems from a decades-old BMW problem with soft cast-wheels. The -- even older -- previous technology of wire-spokes is apparently better (in the eyes of the buyers) than modern cast wheels?
I've never dual-sported with anyone with tube-less wheels/tires and, thus, have never seen any off-highway tire plugging -- altho it's a valid technique other places.
I have heard of, tho, a BMW club member who was dual-sporting in the desert and had a puncture and (luckily he had cell-phone service) called the number the national club provided. By-and-by a service truck was dispatched from the nearest civilization, loaded-up him and his BMW, and hauled them to town where a tire repair was done...