Most areas of northern illinois are off the last week of March

--we are rescheduling our trip from Nov.2007 until March 23-April 4 2008 so I hope the weather is good
Have been several time in July (tooooo humid) and twice in Dec. (once was actually for Christmas)-VERY BAD crowds Christmas week the week before is a great time to go!!
Staying at POP for the first time