I saw a post about a picture of Kerry and Ted Kennedy. The poster said that the caption under the picture stated that the two were discussing whether or not Kerry should risk sleeping in the park and getting arrested. I guess he decided not to, and Kennedy probably helped him out.
I've seen the photo of Kerry and Kennedy at the event, but not any mention of what they were discussing. I do remember that Ramsey Clark, the protestors' lawyer, had legally advised them not to sleep in the park.