I think its almost bound to happen with either pick.
If you chose Pete it seems like he has a good chance in living if he cuts off his foot but with no medical supplies with a long walk back to the cabin(depending on how far they are) it would almost seem like certain death either way. It would be suspicious if Clem came back by herself.
If you chose to go with Nick and not help Pete, Nick already starts blaming you for not helping Pete, this may also cause suspicion if he tells the group that you could have saved him.
How do you think the choice of Pete or Nick will effect what the group thinks of you?