In addition to working on my '66, I have been looking for RV port designs. There are quite a few great looking structures that I've seen on our website. I came across another website devoted to the design and construction of garages, barns, carports, RV ports, etc.
The Garage Journal
I have only looked at the site for about a half-an-hour since I was called away to drop my black tank and never made it back inside until just now, but it looks like the members of the garagejournal forums are just as passionate about garages as we are about Airstreams!
Go there and be inspired!!!