Replying to DIN setting for Park?

I am sure this has been asked and answered hundreds of times, but I cannot find it. What is the proper setting for release setting for my bindings in the park if I am NOT going to be hitting huge jumps. My primary goal is rails/boxes/and small kickers. I asked the guy in the tuning shop who mounted my bindings for me and he suggested I set them to type 3 skiier with very high release settings. This didnt seem correct to me so I just had him set them at 2 like my old park skis. It seems to me for rail work though I would want them set to release easy incase of any contact with the side of the rail/box or whatever. So whats the correct answer?