Cakey Bot can automatically load entire playlists of songs from Youtube and Bandcamp. When you use a playlist URL instead of a song name, every song in the playlist will be added to the queue.
Cakey Bot also has it's own built-in playlist system. If you already have songs added to the queue you can save them with
!playlist save <name> and it'll create a playlist for you. If you want to load them back into the queue at a later date you can simply run
!playlist load <name>. You are also able to delete playlists with the
!playlist delete <name> command. If you want to see a list of all of your playlists and the amount of songs in each playlist you can run the
!playlist list command.