There were fanzines and newsletters, home-made props, costumes, etc. Almost all of it is now lost to history.
My father has a fantastic and huge collection from the seventies through about 2005. All the copies of old fanzines that he could lay his hands on, direct mailings from various fan clubs and mail order from scifi company now long out of business. Toys and dolls in their original packaging. If they sold it at a convention he snapped it up.
He has a special room downstair in my parent house, climate controled (I'm not kidding) where all this is stored in plastic envolpes and srink wrap. It's like a shrine.