It is hard to know. 'Buffalo bird women' was the name of a specific person who grew up just before Europeans arrived (but smallpox arrived before she was born, and probabchanged culture). If you google you can find interviews with her as an old Lady. She gives a picture of how things changed over her life ,but not so much before.

Unfortunately north America in general doesn't have easy access to materials that survive for centuries and so there is limited archeological evidence to work off. (Not zero, but we know little about culture because they couldn't leave much evidence of it behind).