Originally Posted by NoviBill
My take - If you have the background (or want to develop it) to change a tire, carry one along with the gear required. Otherwise carry a few cans of fix-a-flat and get a good TPS (more likely to prevent an issue with good tire pressure). The nice thing about being in a MH is you have food, water and a bathroom. Waiting 24 hours is not a major.
But getting stuck on the shoulder of a road is no fun. You will be on uneven ground probably leaning at a reasonable (?) angle. You will also be hoping that the ground is nice and firm, not soft and slushy. Also, any large vehicle passing you will buffet your vehicle possibly causing liquid spills, making it hard to relax and even cooking may be an issue. So it will not be too comfortable sitting there for more than a couple of hours.