The port area isn't always a great place for viewing the launches since there is so much there to block your view. The view from Exploration Tower is pretty good, but it was a bit crowded the one time that I was there for a launch.
We went there for a Delta launch, we were staying at Disney World and had a rental car. When we got to Port Canaveral it seemed odd there was not a soul there watching. We drove over to the guard shack at the gate to the AFB and asked. The guards told us it had been scrubbed, when it was rescheduled, and what the problems were. A complete report.