I leave the blinds closed to prevent sun damage. But I've left one or two open before by mistake.
I don't give much thought though to someone looking in the window. I think that it would be rare in the period of five days for somebody to first notice the blinds on one window open, then decide they want to walk over and look into the trailer. After that they have to be a dishonest person to actually break in as opposed to just curious what this model trailer looks like inside.
I'd be more inclined to think that your trailer sat for five days unnoticed in the storage lot, while maybe four people maximum pulled an RV in or out.
If you're really curious you might ask at the office how many people move their RV in or out in a given week. I know where mine is stored most of the trailers are sitting and rotting away from lack of use.
