Well I have a little experiance in this. I help moderate www.coloradok5.com
forums. The site has been averaging over 3 million hits per month for close to the last year and 12496 registered users in the forums. http://coloradok5.com/forums/ubbthreads.php
It suck up 110 GIGS of band width a month. You moderators here thought you had it tough LOL.
What was done here with trying to organize the forums is great but the problem is so much changes from year to year ,model to model, plant to plant that it is very tought to document some things and we are not even counting mods PO's have made along the way.
The best thing I could recomend doing is create some good "Foundation" write ups. That way when somebody comes in and asks a question you point them to those write ups. If they have more questions then that can be disccussed. What it will take is people taking the time to document repairs and upgrades they do and make the effort to contribute these.
What Steve Fox (Mr. CK5 the sites founder) has done is the main site has product reviews and tech write up archives. As members do modifications and try new products they are welcome t
o do a write up. on the main www.coloradok5.com
from page is three product reviews I have done in the last 6 months ( the Disc brake, CTM joints and Mile Marker our mine). Those rotate off into the archives as new ones are added to here http://www.coloradok5.com/tech.shtml
or here http://www.coloradok5.com/review.shtml
The way write ups are turned in is the writer uploads the photo's to their members album. Then the write up is posted in "The bloody knuckle" (members forum so your not going to be able to veiw that one). So if one forum was set up for people to place ONLY contributing foundation write up's it would make it very easy on whomever takes on being the web master of that section. They would grab the pictures and store them on the site. Then grab the text and put the links in to the correct pictures.
One that would be great is WilliamHenchel. He has step by step photos of how to replace a full floor. If he could put a story together with those pictures and little tips that he figured out along the way it would make a great foundation write up.
Then as questions are asked like " how do I replace a heater core" They will get directed to here http://www.coloradok5.com/heatercore.shtml
It takes a while to build up those foundation write ups but once they are there and more people have contributions it will work. It's getting people to take the time to document stuff and make it availabe to others that is the tough part.
The water system is pretty straight foward. You have the older Air over water pressure system or you have on demand electric. A few write ups like "grover air pump rebuild" and "On Demand pump replacement" should be a good help to everybody.
The one that femuse has already pointed out is going to be a real nightmare is electrical. I just don't see how you can easliy sort that one out. two factories doing different things on models with the same name. This is like a Lucas electrical system. Things were different from shift to shift. Short of Airstream providing any electrical system info they have it's going to be hard to make anything other then general repair and upgrade information available. As write ups are turned in you will just have to start it off "Fuse upgrage on a 59 Caravanner built at the Ohio plant. Your A/S may vary".
What it would take is some space to store these out of the Forums and somebody to take the time to post them.
Hope that helps.