Metro is an affordable public transport option servicing the northern, eastern and southern suburbs of Hobart (aka, the majority of it). Most buses arrive at the Hobart Central Bus Interchange on the corner of Macquarie and Elizabeth Streets, which is walking distance from almost all Dark Mofo venues. Routes and timetable available here.
Salamanca Market Shuttle Bus operates a free service on Saturdays between key city destinations including Hobart car parks and Princes Wharf 1, 9am–2pm. Routes and timetable available here.