This is my first post and I'm still trying to figure out the best way to search so forgive me if this has been asked before - We are a family of 4 (mom, 20 yo daughter, 18 & 16 yo sons)that will be making our first trip to Chicago for my son's graduation trip. We are planning to arrive 6/4 and depart 6/9 and have decided to travel by Amtrak. Would like to find an inexpensive($150 or less) but nice (safe, clean, etc) hotel not too far from Union Station so we could walk. Some of the things we would like to do while in Chicago are Navy Pier, Field Museum (gotta see King Tut!), Museum of Contempory Art,Art Institute, Frank Lloyd Wright/Robie Home, along with with other artsy type stuff (my kids are art nerds) and of course some shopping. I would appreciate any advice you could offer to help us enjoy our stay.