Some thoughts for you OP (based on a doula training I've done with Michel Odent) and my own experiences:
Have a more natural labour isn't necessarily about being in hospital or not, or in the birthing centre or not, but how safe you feel, how much privacy you have and being disturbed as little as possible.
So, a move during labour is disturbing, whether to the birth centre or labour ward. But there are steps you can take to minimise this. Vice versa a home birth can be very disturbed, even if you haven't been anywhere.
Think of labour as a process like falling asleep, having a poo,or having sex. If, during nay of those, at some point you would get in a car, drive for a while, then walk through bright lights to meet a bunch of strangers who will then talk to you, shine lights in your face, have a prod, and then expect you to carry on. Some people can, but most would find it difficult to just drop off on the hospital bed, or carry on having enjoyable sex. Especially when those strangers continue to keep popping in to disturb you regularly.
Suggestions: talk your Birth partner through this. Tell them their job is to handle and minimise your direct interaction with other people, including doctors and midwives. This means:
- drill your move to hospital so he can navigate the whole thing without you (we didn't both as its not far, my DH cocked up and took me to the wrong entrance, I'm still angry about it).
- tell him it will be his job to monitor you contractions at home, length, time apart, but he must do this by observing you, not talking to you. Get him to make a chart maybe.
- write in your birthing notes that you want as little direct talking interaction as possible. So when you arrive at triage, your DH leads it, he briefs on time in labour, length and space of contractions, whether you waters have broken, etc. He asks all questions to be directed to him, and intervenes if hey are not. He only relays to you if absolutely necessary. I did not realise how even good news is disturbing. So having a midwife bellow in my face 'WELL DONE GOOD LUCK YOU ARE NINE CENTIMETERS' in triage is disturbing, which delayed my labour, just the same as if I appeared in your bedroom tonight, flashed a torch in your eyes and said loudly WELL DONE YOU ARE NEARLY ASLEEP NOW. Chances are you wouldn't be any more.
- I am a good negotiator so thought I could handle pressure for interventions. But the reality is, negotiating on this is disturbing. Just like negotiating about light on or off, window open or closed,will delay you falling asleep. So have your birth partner handle those discussions.
- ask now if you can have a mobile monitor. I ended up with one, but I could still move about. I also found it very reassuring to hear. Not all interventions have to be a problem - that one soothed me.
- try to be clear to your DH (only) about what you feel and need. Despite being 9 cm in triage, I was in labour for another 14 hours. According to my notes with a 12 hour pushing stage. This isn't really true. Rather the move to hospital and subsequent events disturbed and then frightened me. So my labour slowed halted at the transition point. I never had a true urge to push. Aside from being afraid (a midwife was struggling with a standard procedure which was triggering for me) I was cold, tired and hungry. However, the room I was I was freezing and apparently could not be warmed. No one offered me food or sleep. Rather I was instructed how to push (ie disturbed) repeatedly for about 7 hours. By the time I realised I needed to rest doctors were involved. So they gave me half an hour. After about 27 minutes I was just on verge of falling asleep (which is common in long labours, as the body needs to rest. Often delivery is swift after you wake up) when they crashed back in said WELL THIS ISNT REALLY WORKING IS IT. Waking me up, and moving on to the next stage of intervention (induction drip, which didn't work, since I was tired, my body needed rest first ).
Honestly, the less you directly interact with anyone, the faster your labour will go. Focus on that, and planning for that, not timing. A final though: could you find somewhere close to the hospital to be? That way you could travel early in labour (so you won't worry) then labour close by and go in when the time feels right.
There is some truth that the trick to a hospital birth is to go in late enough that the birth momentum is too strong for it to be disturbed by intervention. I wanted to go in as I could feel transition coming. I've often thought if I'd stuck it out for another 30mins the hormones of transition would have release naturally and I would have delivered much easier and earlier.
Fwiw the delivery was fine, in the end, though a on induction drip flat on my back, epistiotomy and ventouse was not what I wanted, at all, and I still consider unnecessary if my needs had been met (warmth, rest, food, to feel safe).
Good luck!