Sonya was all for exploring the place. It didn't even have to be for supplies at this point, it could've just been for recon purposes-just so long as she got out of this metal labyrinth. Traveling for supplies and with someone else from the military (not Army, but she wasn't picky at this point) were just side bonuses.
She arrived promptly at the door when she said she would, dressed in black fatigues with a side arm and knife. Worst came to worse she had her own power to call on, but the last thing she wanted to do in a strange place with no known enemies was to call any to attention.