I understand what you're thinking - I'd prefer nothing over the window, too....however, before you go too far, think I'd do just one small window first and make sure you're not messing up the design. Guess I need to go outside and look at our TT and see what the graphics look like....I'm thinking they skirt the windows and there is definitely nothing on them. Suggestion would be to start with a hair dryer and pull slowly. Ditto on the Goo Gone.
PS DH just went and looked and our Rockwood does have graphics that stop at the window and then continue on the other side....guess I'd never noticed.