I live on the North Cornwall coast with plenty of hills and the occasional ride on Dartmoor. I went from a triple to a compact and found it didn't take long at all to adjust. I would recommend a 32T for the steepest hills. I am running 34-32 on 2 of my bikes and a semi compact 36-28 on the third. There are only three hills locally I struggle with on the semi compact so if I know I'm going that way I take one of the compact equipped bikes. 34-32 should be fine around Dartmoor.
