Can do I make all of my Illustrator documents accessible to others?

There is a way to quickly add multiple Illustrator files to a CC library that can be shared.

Open Illustrator and make sure the CC libraries panel is visible.

Create a new library for sharing.

From a folder or another place on your machine,  select one or more Illustrator documents.

Drag them to the Library panel to add them to your library.

This will make a copy of your files in the library. Don't throw away the originals, you never know.

Libraries cannot easily be backupped, although you can make a copy of it as a .cclibs file, this file can only be opened in the Library panel.

A thing to watch out for are linked files. As long as images are embedded, there should be no problem, but I have not tested it with linked files.

As far as I know there is no history for Library files, if someone you shared it with messes it up, you can only replace it with your original local copy.