I found this topic interesting because I'm about 1 year away from trying retirement in an RV. I suppose I won't do it forever, but I might. My goal is to see the country and maybe find a place I like better than dusty ol' Dallas to spend my remaining years. So I checked out the blog link on the OP's signature. It appears that he is mid-70s. I'd say that's been a good run. It might be time to slow down (a little). I'm thinking if I keep my RV that long I may just park it somewhere nice and live in it cheap.
For me the problem is a little different. I have a wife 20 years younger and she's not ready to retire yet. But she likes the idea of travelling with me, so I may help her financially when she can't work and we may park a few months each year and let her pick up some seasonal work (and me, too). As a programmer I can be picky and take short-term contracts here and there. When you're married you have to negotiate and compromise a lot, but it can be worth it.