So, I've been thinking about this a bit. How about presenting it something like this:
"Querida mio, I grew up camping, and would like my children to camp as well because a lot of really special memories for me come from that, but I know that it's not something that was part of your life, and you may not be happy in a tent with all the bugs and bears and things--I thought getting an Airstream would be a good way to make both of us happy. There's this thing they call "glamping"...glamorous camping!"
Then show her all of the STUFF there is online about glamping
. And enlist some of the Silver Sisters to help you in your quest! They look like a fine bunch and surely she can make some friends among them. (And if she does, don't be surprised when she
takes off in the AS without you