Several suggestions here...
You might take a look at this thread, it has some good food for thought! http://www.airforums.com/forums/f353...eam-22920.html
You should look at the rally calendar ~ as we are starting to arrive at rally time, see if there is an Airstream rally near you and go! Folks will be glad to meet you and most are happy to show you their Airstreams. It may give you a good idea of what others are doing and how they "cope"!
When looking at an Airstream to purchase, take everyone along. Sit in it for awhile and see how it feels. Imagine where you would have everyone sleep, play, etc.
You also need to consider where you will be camping. Are you mostly interested in RV parks, or out in the wilds and National Parks and such? Larger rigs have some trouble in some state and National Parks as some have length requirements.
Airstreaming with your family will be awesome. Remember, if the one you find eventually doesn't fit your changing needs ~ trade it in for another! Besides, many of us wind up with aluminum fever and find ourselves owning more than one. Yikes!
Mrs. NorCal Bambi traveling in S Tardis ~ from the Great State of Jefferson