dc1 epidural, drip on my back, none of it my choice, but hey, he arrived fine and wasn't coming out on his own (was back to back, 48 hour labour and he was 10lbs 1oz with a HUGE head - no seriously, the head of a 4 month old, I am amazed he got through the birth canal at all)
dc2 induced with pessary, then all natural, 2 hours, no pain relief, standing and walking very do-able, was actually very positive experience
dc3 induced by breaking waters, 1.5 hours labour, all natural no pain relief, standing up whole time, harder than dc2, did have a moment when I thought 'How do I remember this as a do-able thing - OWW' then she was born, so didn't have any more time to worry. She was 10lbs 7oz, which could explain why she was a it harder to push out. Also very positive, bounced back physically very fast (took 3 kids up to London and round science museum when she was 3 weeks old!)
So it is totally possible, but with dc1 I did end up with all the stuff I hadn't planned for, and it was very helpful to take the attitude that you need to go with the flow, and getting him out safely is more important than the perfect birth experience.