Here is an article about RV'ing and CCD Airstreams in today's Star Tribune.
Sorry about the headline, our headline writers are sickos.
http://startribune.com/stories/462/5261866.html
Sorry about the login required, it wasn't required when I copied the link, but now it is. And for some weird reason, I can't delete this thread.
At any rate, the article states that the CCD makes up 40% of total airstream sales, which reached $1.4 B last year. That's an increase of 83% in two years.