I've never been to Spectro, will be for the first time in a few weeks, but want to say that I don't think most people do set up a tripod for Spectro. Most of the non-flash shots of Spectro that you see on the boards are probably courtesty of higher ISOs and faster glass.
Tripods are good for night shots of still objects so a tripod would probably not help much in getting a clear shot of the floats during Spectro since they're moving. The longer shutter speed allowed by using a tripod would cause the floats to blur, like Tom's (WDWFigment) recent long exposure shot of the parade.
HTH!