DrupalCon New Orleans is next week, so I've updated my GreaseMonkey script from the 2015 conference that lets you export sessions to your calendar. The 2016 conference script can be downloaded here: https://github.com/zengenuity/drupalcon-ical/raw/master/dc2016.ical.user.js
You will need to install Greasemonkey to make this work. Once you add the script to GreaseMonkey, an [iCal] link will show up on DrupalCon session pages right next to the date and time of the session. Click the link to add the session to your calendar. Unfortunately, you still have to do them one at a time, but it's much faster than typing them in.