Safety Knights

In my opinion, yes, because it's not just trailer creep you're worried about, but also the truck driver pulling off with the trailer with someone still in it.

From an OSHA enforcement perspective, using OSHA's favorite answer, "it depends". There's actually an OSHA interpretation regarding this (link below). If it's NOT a commercial motor vehicle ("CMV", as defined by DOT), then it's required by OSHA to have the wheels chocked. If it IS a CMV, then OSHA wouldn't enforce it. However, I'd still recommend it just as an extra layer of protection to keep drivers from pulling off with forklifts still in or near the trailer (seen it happen many times due to a lack of communication).

Check with your state plan (if applicable). Federal OSHA allows dock locks in leiu of wheel chocks, but some state plans do not (they say they always have to be chocked, even with dock locks in place).

https://www.osha.gov/laws-regs/standardinterpretations/2005-11-08

You can also check out this OSHA directive regarding this topic.

https://www.osha.gov/enforcement/directives/cpl-02-01-030