Train
The 1 Line is a fast and inexpensive way to get from SeaTac airport to Seattle (South Seattle, Downtown, North Seattle, etc). Also good way to get to notable stops like the University of Washington and Capitol Hill.
Hotel
Chad and Kristin will be staying in Ballard in an AirBnb, so this hotel will be nearby if you would like to meet up outside of planned events.
Hotel
This hotel is also in North Seattle, although a bit farther from where Chad and Kristin are staying. Very nice walkable area.