Contact the Kennedy Space Center. They have a public relations department designed to answer all of your questions.
Typically, launches are viewed from one of the causeways. You must get a pass, which is not always easy. Time is short and I do not know what limitations KSC imposes in light of 9-11. However, it is my understanding that hey have "lightened up" some to allow visitors access to viewing launches.
You will need a long lens and a tripod!!!
The visitor center of the KSC is well worth visiting. They have tours and all kinds of things to see. The tour bus might get you close to the pad before the start launch procedures, but I don't know.
You need to call them and get the information.
I think the phone number is: (321)449-4444
Marv