Spike - will actually take the advice of some big dumb Captain Woodstock and try out for the role of hero for once. He's got night vision so the black out isn't really a problem, which means he'll be more than open for rescue missions and similar. The guy is hurting for rehab points too so expect him to be very very vigilant in keeping your mortal butts safe.
Aidan - will as always be out doing stupid things in an effort to keep other people from doing stupid things. I kind of want him to get hurt this round? Nothing lethal/serious but bloody enough to freak him out a little bit.
Chuck - is too headstrong to stay inside where it's safe. Will probably keep herself close to the clinic, trusty broom at the ready to guide any injured parties to safety and the healing hands of the docs.
Reid - will for sure be locked safely in the library or something good lord he does not need the drama of ending his days as dinosaur poop.