Changing Tires-still preparing

You may not realize it but motor homes do not come with a jack or lug wrench. Why, the tires are very heavy and the lugs are numerous and torqued very tight. Not all RV's come with a spare tire but mine did. That is why almost all RV owners have a service contract that includes coming to change a flat tire, kind of a heavy duty AAA. Why do I have a jack and lug wrench? What happens if I am in a remote place with no phone service or some place like the Dalton highway (haul road) where a service truck will not come. A lot of the trip in northern BC and the Yukon will be in remote areas. With Big Red and a huge lug wrench I hope I am prepared.