Something else I've thought of (lol, having lots of afterthoughts on this topic!) is that you can read about all the resentment people have at their bad experiences - you only get this experience once, and if your inlaws barge in and overstay their welcome in your special never-can-be-reclaimed moments, you will take a LONG time to get over that annoyance.

Which is WHY it is worth
- making your wishes clear beforehand, deciding with your partner what is going to happen, and then getting your partner and the nurses to enforce this for you, no matter how firm they have to be; and

- not worrying about offending people. If you want them gone, and you want a nap with just you and your bubba, ask them to leave, and if they don't, call a nurse and don't give up til they're gone. If your partner wants, they can all troop down to the hospital cafe for a chat or something. But DON'T compromise on your comfort and experience, because the resentment is HARD to get over. And you don't want that anger, when you are working to settle in with your bub.

Make it clear, that while they might be welcome, it is on YOUR terms. Be brave and be firm hon.