It is very practical to stay at Songesand camp if you want to do the Kjerag hike. But you need to plan it ahead and do some bookings.
You can do the hike with or without a car. There is public transportation at the harbour in Lysebotn up ot the starting point of the hike.
There are two ferries in the fjord in the summertime. The local boat and the tourist ferry.
Booking for the local boat: https://billetter.kolumbus.no/
Booking for the tourist ferry: https://www.visitflam.com/activities/fjord-cruise-lysefjord/?referrer=3895
Timetable and booking for the bus: