Below's a very crude mock-up of the sort of thing I had in mind. This is via a very dated & pared-down version of CorelDraw, but maybe helps to visualize what I was trying to describe earlier.
Kevin--I've used the local sign-graphics place for making up both signs for my home business and the perforated vinyl we used for privacy screening on our teardrop trailer. Whatever they used in both applications held up well for 5+ years... exposed to sun & weather year-round. Fairly small town, so the owner seems to treat us locals very well. [But--a good caution you threw out--I'm not belittling it at all
A further FYI, to anyone interested. Our teardrop was made out of the back half of a car, and one without frames around the door glass, so we were stumped on what to use for privacy "curtains" when camping. The sign place said he had the same perforated vinyl used for pickup back-glasses, and could print anything on it we wished. So we supplied pictures from places we camped in Colorado, and he printed & installed them for us for $200-250 for the 4 windows
. 5 Years later, they'd sun-faded some--more than the sign they made for my business--but not bad.
And so long as we didn't have interior lights
on, just the vinyl did a nice job of privacy-screening, while still letting us see out easily. Might be good for some camper applications, too.
A pic of the teardrop is below, as well......