Wow! I have to say I'm thoroughly impressed with the depth of the replies I've gotten here. I really appreciate that in a forum, and seeing as I tend to gravitate toward vehicles with a strong community following (I count the Jeep among them), I know I'll be right at home w/ the airstream....
That said, a quick update on my situation: I've decided to heed the numerous responses I've gotten in this direction and pick up a 2001 F-150 w/ the tow package. I'll be storing my Jeep for a year (disappointing, but not the end of the world), and in the end this plan won't cost me much more than the basic mods I was considering in the first place.
On the plus side, we're stepping up to the 23' Int'l CCD, which gives us the same bed/bath arrangement as the 19' but seems to have much more effective living and kitchen space up front. Not to mention those cool high-mounted porthole windows (not sure what you call them).
Oh, and FWIW, I'm quite sure our relationship will endure -- I'm extremely lucky to have found someone that was possibly more exited that I am about the prospect of living in a tiny tin can for a year. And I did get a kick out of Jim Clark's comment, but I think our family planning is under control, thanks