Traveled to camp to grab items from stash, triggered Gale somehow as he started screaming "Intruder!" and I had to knock him TF out.
It has since happened at least one other time with our pale elf friend randomly aggro-ing upon fast travel to camp if he isn't in the party.

"It's called 'Splash Damage' you crybabies. Suck it up, or go whine to the Cleric."