I'm late.
A box is not needed.
But a manual that includes the details and overviews needed, designed to be printer-friendly, and not, as is the vogue today, just a dozen text files and player lists scattered all over the web and forums - that is a MUST.
I do not even demand a printed manual anymore, those days seem to be gone. But a manual pdf-file worth the name that includes it all and could, if need be, printed without getting a greyish mess of light grey text on ink-dripping dark background pages.
Not implying you planned to mess it up this way!
I am just about many bad experiences I had with lacking of ill-done pdf-manuals over the past two decades. Just a comelete manual file, black letters on white background, and screenshot illustrations where need be that can be decyphered if printed out.