To reach Camac Valley from Dublin city centre take the 69 bus from Aston Quay (near to O'Connell bridge) and ask the driver for Camac Valley (the bus stop is right outside the campsite).
Going into Dublin the bus stop for the 69 bus is directly outside the campsite. Please refer to the timetable on dublinbus.ie for departure times.
No 69 Bus Timetable
No 69x Bus Timetable

Alternatively you may take the Dublin City Sightseeing Tour Bus which departs the campsite at 9.30am every morning, 7 days a week, for a cost of euro 2.00 per person. This bus does return in the evenings, please ask the driver for full details.