Welcome to the forums! Lots of good information here! Here is a older thread but has lots of good info for the prospective Airstreamer!
Considerations when buying an Airstream
A great way to look and get a feel for what will fit your lifestyle is to attend a Airstream Rally. Folks will welcome you! Just introduce yourself and that you are looking! There is one coming up the weekend of April 10 at Casini Ranch along the Russian River out of Napa area. Not too far from Bay area. Take a look at the Rally Calendar link at the top and click on it. Then click on the rally to go to more information. I am sure a post in the thread will give you ideas.... you can ask about joining the potluck in the evening on Saturday if inclined. Usually at rallies folks have their Airstreams open for visitors and rally folks often wander from trailer to trailer to see what cool new things folks have done to theirs. It is also a great place to ask lots of questions and see everything from vintage to newer rigs!
Anyway welcome, and ask all your questions! Many of them, like trailer length are completely personal preference.
If you like vintage you can find interesting things here:
Vintage Airstream Photo Archives
Here is a site that has floorplans and pics of "newer" rigs:
Fred's Airstream Archives - Travel Trailers and MotorHomes For Sale
Have fun looking!
Mrs. NorCal Bambi traveling in S Tardis ~ from the great State of Jefferson
My blogs:
Yreka History Siskiyou County Camping