For organizing a group of volunteers spread across the country to contribute and modify notes, links, and other information, a collaborative and accessible platform like a "Wiki" would work best.
A Wiki allows multiple users to create, edit, and link content in a collaborative manner.
It facilitates easy sharing of information and updates in real-time, making it suitable for remote collaboration.
Platforms like MediaWiki, Confluence, or other wiki software can be utilized to set up an efficient and user-friendly system for the volunteers to collectively contribute ideas and information for the fundraiser event.
Hence, in the above scenario, the best kind of website that would suffice is a Wiki website.