re: Chicago...staying around Miracle Mile. Still a good idea?

There aren't any not safe areas that you need to worry about.

You originally said you were going to take an Uber back to Rosemont. He was warning you off major traffic going east west to get to the highway. Plus major traffic on the highway due to nightmare construction.

You'd be better off taking the blue line back to Rosemont but you still need to consider the time it will take to get to a blue line stop (which is considerably west of Wrigley, Lincoln Park, etc)