Best Answer: The facilities at the North Rim are closed during the winter, so you would be going to the South Rim. The nearest major airport to the South Rim is Sky Harbor airport in Phoenix. There are smaller local airports at Flagstaff (about 1.5 hours from the canyon) and also at Grand Canyon itself.
By default, your cloud-stored OneNote files are actually cached locally on your machine (for performance and when you are working offline) to a hidden location at C:\Users\<user>\AppData\Local\Microsoft\OneNote\<version>\OneNoteOfflineCache_Files.
When you add images or attachments to a notebook, normally these binaries would be stored in the notebook's folder, but OneNote is not smart enough to do this when the notebook is stored in a subfolder of a document library. So it puts all the OneBin files at the root of the library. The OneBin files are linked properly from the notebook, but they aren't hidden from view as they'd normally be. The workaround is to create notebooks at the root of the library; then everything works as expected.