ok so ive been trying to get into fort mccaren for the legion quest and i have gotten in but ouside there is a hostile crimson caravan guard even thought im accepted there...no matter what i wear they attack then if i kill the caravaner or not when i walk inside the Seregant or whatever is hostile no matter what....do i have to be accepted or neutral with NCR to talk to him...what are some quest i can do to get good with the NCR again?