Right! Here's what I do.
Corners are my best friend in PE. Essentially I make pieces up that have the corner in the middle, and go halfway to the next corner. because usually there's a ladder coming up from below along in there, or a mooring bitt, a gun or a hose reel that offers a good place to stop the railing. If not, it's a lot easier for me to make a joint along a straight run. With a pre-formed corner, the PE sits nicely on the model while the glue dries, too.