Creating packages
Go to Hierarchy, select your prefabs > right clic > Select prefab root option.
With the prefabs selected in the project window > select its dependences.
Now with all dependences selected, do right clic to export Package.
( ! ) When creating a package, some times the option [] include dependences have some bugs, to avoid lose scripts or some dependece just verify it creating a new scene an importing the package.
( ! ) Delete the prefab from Hieracy, and re-drag again to Hierachy and start the proces again, just for have good luck this time.