This article nailed it, your nervousness was well founded. A simple mechanical issue can become quite serious in the middle of nowhere. Once you are out of cell service you are at the mercy of your fellow travelers and that can be a toss up of who appears next.
Mechanically one should ideally travel in a vehicle they can perform minor repairs on. When I am up north it is two full size spares, tire kit, inflator, tools tape and some extra fluids (oil, coolant etc). When your fancy van dies out in the middle of nowhere it may not be fun. Plus the bugs suck lol. September in a canoe, in a group is the best time to take in the far north.