I'm a Product Manager on the OneNote team. I'm sorry for the confusion that our Watch app has caused you - hopefully I can clarify a bit. The watch app will show the 50 most recent notes that you've edited on your iPhone (which you can find if you go to "Recent Notes" on iPhone, above the list of notebooks). Although we don't currently have a way to show only a subset of pages on your watch, if you pin a page to the top of recent notes on your iPhone, it will show up at the top of the list of pages on your watch. Hopefully this workaround will help you quickly find the relevant pages you need on wedding day! With regard to syncing these pages to your watch, if you launch the phone app, wait for it to sync, and then background the app on the phone, the pages on the watch should get updated.