A couple years ago, John “Muggs” Ferguson and others put together a guide for SolidWorks World attendees.  It covers the essentials for getting the most out of your time.  It doesn't cover things like dress code (which gets asked about sometimes).  I think "business casual" is preferred.  In my experience, that can mean different things to different people from different places.  In some circles, business casual could be a salmon colored cotton pull-over polo shirt and bermuda shorts.

Who's coming to the conference for the first time?