You are afraid because the coach is OLD? We did just under 12K in a 1973 build this year and do 1K hauls regularly. If you keep up with the required maintenance, it is just the driving...
Start your research on Yellowstone TODAY. The only FHU in the park is Fishing Bridge and it is hard side only. Some campground parks are hard to get reservations for at this late date.
If you might take two cars into the park, get at least a pair of FRS radios. Cell coverage is spotty and you will be tied up in a Bison Jam or a Gawker Jam so just sit back and enjoy.
Matt
