5e124423_A_Conference___Altimeter_Group__Upsides
[Use Cases] Accessibility and Logistics [Downsides] Yet due to headcount increase, the event is straining housing, and unless you book 9mos early, you'll be paying an expensive travel and expenses bill. [Upsides] 
The entire festival officially and unofficially spans the entire city, walking or pedicab rides enable quick access to most events.
SXSW is a Festival –Not Just A Conference | Altimeter Group
Upsides