Unlike a smooth finish car, the Airstream has rivet heads that park above the surface. You can go around them, but that will look terrible IMHO.
If you cover them, there will without question be a gap between the rivet head, body panel and the clear film, just inviting water and such to accumulate under there in that area and leading to finish corrosion. IF it was such a great idea, Airstream would have done it, particularly when these things are now at or well above the $100k mark.
Get a good set of rock tamers for the tow vehicle, get the pano front window, and the post mid-2005 model or newer that has the taller stainless steel rock guards.
If you still wanted to put some in clear film between the rock guard and the pano window, that might be ok, but I simply don't see how you are going to get that film to cover the rivets effectively, and if you don't cover the entire front, what is the point? IMHO, you've left part of the front end exposed.
Road rash and small dings are just a part of the overall ownership. It can be minimized with items mentioned above along with a good washing and coat of wax a few times a season, but you will never fully protect it on the road, plain and simple, unless of course you install Star Trek type shields....