Very interested to hear how this tows. I have a 2006 4Runner Sport V6 4WD and am on the verge of buying an Airstream Bambi 16RB Sport - dry weight of about 2900lbs, GVWR 3500lbs and tongue weight of 348lbs.
Have heard all kinds of things and have determined it will lie somewhere between being a nightmare and barely noticing it's there! Lol.
I know Airstreams are relatively aerodynamic, have a low center of gravity, and with the exception of things like a rear view camera or bike rack they come pretty loaded up from the factory so would trust their weight claims, but still I wonder.
The dealer (Can-Am RV) and it's owner (Andy Thomson) are renowned for their knowledge of towing and have suggested brake controller, WD hitch and stabilizer which I initially assumed was typical dealer add-on junk but as I poke around the interwebs it would seem this equipment does work and is worth the price of admission.
Of note: When I was at Can-Am I noticed a 22ft Airstream hooked up to Mercedes C350 Coupe (V6), a longer one hooked up to a Jaguar XF, and yet another hooked up to a V6 Mustang convertible. I walked in thinking there was going to be a lunatic convention inside but they are actually dealer TV/TT set-ups for test-driving to show that properly chosen hitch/stabilizing equipment can make a big impact on what you can tow and how safe the set-up is.
I am not in CO so will not have that kind of terrain to conquer, but am interested to hear how it goes for you as the weight of yours is in the ballpark of the Bambi 16.
Thanks!