If we want to walk back from Navy Pier or Millenium Park/Grant Park or Aviary to Mag Mile North area to the hotel late at night, should we be OK? Just two of us and we'll have our camera in tow. Am I safe to assume that you just have to be aware of surroundings, etc. Is there any part of the city where it can be questionable? Same goes if we want to go for an early morning stroll?