Brendan, what has worked for me is that I give the shop tech my spec...age, height, weight and pick one of the level skiers they give you for choice...like I, II, III. With "I" being a beginner.
Then I let them set the din and check and set the sole plate distance between the toe piece of the boot and sole plate on the binding. They also check the binding for proper release action.
Then I get on the mountain and ski my terrain. If I'm skiing a bump line or jumping off something and a ski pops...I crank up the din in 1/2 increments.
Unless you're skiing "sic" lines, and "sic" steeps, those skis should release on a bad fall...save an ACL or MCL.
Me....I'm 58, 155lbs, picked the Level "III" when they set the din and they always set it at 6 because of my age. From past din setting experiences, I knew that would not work. As soon as I got home, I moved them to 7 cause they were popping off at 6....not nice. I have no problem with them wandering away from boots now.
Just one mans opinion, just be cautious if you start changing the shop set settings. Those settings are designed to protect body parts.
Gary