I was in Scouts, both as a young boy and adult with my son.
I'd never wear my belt in Scouts for several reasons, potential chafing, hygiene and of course being seen in it.
Now for some extra thoughts.... Ticks and other bug bites... Heat Rash... (revised- and the opposite of heat rash -- COLD. I've camped from 95 degrees F and higher (35 C) to into the teens (-18C).) NOPE would never wear it on a typical Scout trip.
Megan They do have girls in Boy Scouts now, so you would be welcome in almost any Troop or Crew (Venturing has always been co-ed). I think you are in the USA right?