Gale Workaround: It appears that Gale is attacking because of the familiars. I remembered that one of my party members "disapproved" when I summoned an Imp, so I loaded an earlier save, killed all familiars, then went back to camp. No attack this time! I can carry on for a while I guess, until I hit the part where Gale dies for other reasons. Hopefully a fix is incoming.