Delta do have this thing where they appear to give the same luggage benefits applicable to a status customer to everyone else on the same reservation. Whether this also includes FB status pax and not just Skymiles I don’t know, but given that you report that Delta seems to think you have 2 bags each then that’s good news.

I can’t really see you fitting bike leathers for more than one person into a single suitcase, so my advice would be: pack what you each need, and see what happens. It sounds like your allowance is being observed by Delta for your buddies. And if not, will having to pay a fee to check a bag be the end of the world?

Enjoy the trip! I kind of wish I was tagging along too!