we have 10 people leaving Friday for an Eminem/Rihanna concert in Detroit on Saturday. What is the best way to get there and avoid as much traffic as possible?? we will be leaving around 7:00 from Cedar Rapids and wanted to drive around 1/2 way and then finish the drive in the morning, any nice small towns that are decent to stay in? we have 2 rooms at the Hilton in downtown Detroit a block from Comerica Park, just wanting some ideas from people who have been there before... is downtown pretty safe?