For your question I would say your looking for Survival as a skill and Intelligence or Wits for attribute. Depending on your style, I would go with int.
I don't think Investigation fits for your situations (or any tracking related activity) because of this from NWod Core book page 59:
Investigation is the art and science of solving mysteries, examining seemingly disparate evidence to find a connection, answering riddles and overcoming paradoxes. It not only allows your character to get into the head of a killer to grasp his motives or plans, it allows her to look beyond the mundane world to guess at answers to mysterious problems, or to have a “eureka” moment that offers insight into baffling circumstances. Your character might realize that all murder victims have the same digits jumbled in their phone numbers, she might interpret a dream that has striking similarities to events in the real world, or she could recognize why an intruder took the time to paint a room red. Certain individuals such as law-enforcement officers, forensic specialists, scientists and investigators are trained in the art of examination, while others simply develop the knack through years of practice...
Investigation is more getting into the mind set of someone.
Survival is more about actual tracking.
I would go for Int + Survival for your situation.