Can't import the conference itinerary into your calendar?
I couldn't either, so I scripted a little tool to parse through the
.ics file and fix some of the issues.
In particular, this fixed issues with the time sometimes missing a digit and not having a time zone.
It also (tries) to fix broken descriptions...
Your mileage may vary with this, it worked for my calendar import but might not work for yours.
I'd highly recommend importing into an empty calendar so you can delete it if the import fails.