In my older D/P, I used to change them all the time. I even had two blow-outs on one trip which I change on the side of the road. I carried a 20 ton jack, all the tools and a 6 foot cheater bar. Never had a problem doing it and I did have roadside service. I just didn't want to wait 3 or 4 hours for them to get there. I had one mounted tire under the chassis and an unmounted in a bay although I never needed both on one trip without a repair in between. At home, I have a 1 inch impact which makes things a lot easier.
It sucks but my newer coach doesn't have room for a spare unless I empty my slide out tray.
