I am visiting relatives in Danville, Illinois for 2 weeks in May-June 2005 and plan to spend a few days in Chicago. I have been invited to Six Flags Great America park near the city by the family. I have never been to this park and would like some comments please, including how long one should allow to see the park at that time of the year.

PS: A new water park called 'Hurricane Harbor' is to open next door in 'Spring 2005'.