The concert is actually in Tinley Park, so make sure you have a way to get from your hotel to the venue. I don't live in downtown Chicago during the summer and I've never not had a car to get to Tinley Park, so I couldn't tell you what to take, but check metrarail.com and http://tripsweb.rtachicago.com/ to get around(or a car, if you really want). Both are pretty simple websites. I don't really have any other information for you unless I know where in the city you're staying. I'll be coming from the suburbs for the concert.