It's considered worse to drive (vs fly) unless you have more than 2 people-- and that's for a normal car. With a truck+trailer the break-even point would need more passengers.
https://terrapass.com/blog/carbon-footprint-of-driving-vs-fl...
https://yaleclimateconnections.org/2015/09/evolving-climate-...
https://www.trianglerv.com/blog/post/how-an-rving-vacation-a...
Tiny homes and RVs have about 7% of the energy Footprint of traditional dwellings: https://beginrv.com/tiny-house-vs-rv/
So if you add all that up, its more eco friendly, affordable, and what we've chosen to do.
For the comparison parent post is making - leisure travel - I think there's a big difference in that flying enables much larger distances, thus much more emissions.
You can easily fly 1000 miles each way for a weekend trip. Not as easily with a car, the travel tends to be much shorter.
Or any worse - you apparently didn't notice, but I wrote that there are good reasons to own an RV, and want to reiterate that. Probably in your heart of hearts you know whether your ownership is justified, and I don't need to tell you.
TONs of non-rich people also have 2 properties and go between them. You can buy a cabin or vacation property in the rural US for a surprisingly affordable amount. I know many folks who are certainly not rich, but do spend time in various locations.
Think traveling nurses, seasonal employees, etc. Also look up the term "snow bird"
We live in our RV for 3-6 months a year, in weather from -10 in Colorado blizzards and 120 degree California summers. In rain snow and sleet. I work remotely from it.
A tent is not a home. An RV It is for many of us.
Before you throw more stones, it's far more eco friendly and lower carbon Footprint to own an rv and travel and stay in it in various places than to own several properties and fly between them.