Husband and I will be in Chicago for 6 days at the end of May. We are staying downtown (palmer House). We are seniors, fairly active and want to see as much as we can. Here's the tentative plan. Art Institute, Navy pier, Lincoln Park Zoo, Chicago Cultural Center, Grant Park, Millennium Park, CAF tour, Willis Tower, Museum of Science and Industry, Cubs game. Is this too much to do?(sounds like a lot to me!) Would a tour of some kind be a better way to get around? We plan to use Uber or a taxi as well. Any suggestions on how to best arrange our time? Thank you for any suggestions.