Just export an assetpackage and select the scene along with any relevant prefabs, materials, models, scripts, sounds, custom actions, etc...
Generally with good hierarchy structure this is easy, just select the Assets root folder, go to export a package, choose the None button to deselect everything, then go find the folder of stuff you want to send him and check that folder. All its subfolders and such will be included. I don't recommend ever using Include Dependencies.
Also, never include the Playmaker folder. Sharing the DLL is not allowed so generally its best to just steer clear of sharing the entirely. If you're sharing templates, again I recommend putting them in a separate asset subfolder for easy packaging and organization.