I have never had a girl w/ a peanut allergy so severe that she carried her epi pen w/ her. Where does the encampment director think the peanut residue will be--the lodge, the kitchen, the tents? I believe if this camping trip is being sanctioned in anyway by your Council it must be available for all girls to attend. Steps should be taken by the staff to ensure all girls safety. Have you talked to your girls' parent? Will the parent be attending with you? Ultimately I would leave it up to the parent to decide if it was safe enough for the girls to attend. I would be having a meeting with the parent, your SU manager, and the person in charge of safety at your Council to discuss how everyone is going to make Girl Scouts accessible and safe for these girls.