UN is much easier
I suggest making them wear a Uniform ... Florescent Orange with a reflective white stripe right down the center and another horizontal about nipple high, or they can go home.
And the Blue Helmet
“I suggest making them wear a Uniform ... Florescent Orange with a reflective white stripe right down the center and another horizontal about nipple high, or they can go home.”
I think it would be better to give them a brown coat and a cap with antlers for hiking in the Wyoming wilderness around the first of October