By jove, I’ve done it. Thanks for the file , that helped immensely. It looks like the whole matter was solved by unchecking a single box: the Do Collision Test box for the camera’s Spring Arm, as shown in the image below.
\
And as far as I can tell, that should do it. Also, for , if you go to Edit -> Project Settings -> Maps & Modes and uncheck the Use Splitscreen box you should be able to use the spawning feature instead of populating the characters yourself.
And both of you, thanks again for all your help! I’m glad we could get this hammered out. 