My DW has had a bad back for years and she loves the bed in our RV - she sometimes has to sleep in the RV bed instetad of the house bed when the RV is in the backyard in order to get a decent night's sleep.
We're both above 70 and see no end in sight to our RV'ing ... but now I may have to modify the entrance step so the DW can get up into the coach with less pain. There's a whole bunch we haven't seen in the U.S. yet, and we hope to make our first RV road trip to Alaska next summer.
Our home is very comfortable and we're very blessed and thankful to have it - but it carries a lot of responsibility baggage whenever we're living in it - so vagabonding around on the open road in the RV gives us a break from all that. There is nothing like being free-as-a-bird out in the middle of nowhere snug-as-a-bug in your little self-contained nest!