In reply to zmv:
1. End of March is early, good chance there will still be snow, it'll be cold, too early really. All the climbers here will be skiing.
2. I only ever drive, not sure about public transport
3. You camp at the farm. It's 80nok per night, but there's kitchen and washing facilities
4. Everyone is doing Thor's hammer so it must be good. I've added a fair number of routes to the flatanger crag guide on here, with stars. There's a multi pitch starting with Min første gang which is quite fun. A few fun 6s too.