Figuring how far inside a 5er tracks
Having pulled long GN flatdeck trailers for a living and towed RV and agriculture doubles off and on for 30 years it depends on what you do with the steering wheel. And what you do with the steering wheel depends on how sharp the corner is.
Example making a right hand turn on corner that has a deep ditch and the corner is very square and narrow streets.
I pull straight forward and at the last second crank the truck hard to the right so the trucks left front wheel/fender just clears a obstacle. This causes the back of the truck to swing out pulling the trailer farther out from the ditch. Start your turn too early and the trailers wheels cut across more.
And I've had too make a two point turn getting the back of the truck farther away from the ditch.
Bumper pull trailers make it easier for those type turns.
Practice at a wide corner and see where your trailer tracks using different steering input.
Picture diagrams would be easier to see than verbal instructions.