I've never done BC, but I can't imagine doing it in Beaufort in the Summer.
On the general subject, we were partying with friends one July 4th a few years ago on a dock right next to the Beaufort hospital, when this guy comes running across the hospital lawn, down the rock seawall, and into the Beaufort River. Did I mention there are oyster beds in the shallows? Did I mention that his hands were handcuffed behind his back?
Right behind him are a Marine MP and a private security guard, who were NOT HAPPY they had to get all wet securing this guy. I think they dropped a radio into the water, too. This provided quite a spectacle for the group of us partying on the dock, some of whom were retired military. We're pretty sure the guy was a runaway Marine boot from PI, who would likely be getting the boot.

A few pings to some of you who might get a chuckle out of the story and pic above. This from 2010.
Humidity really wasn't that bad. The sand fleas were what was horrible.