How do I split a large Pages document into multiple Pages documents
Although you could script this in AppleScript since Pages is scriptable, I've never had enough sections to make the time spent crafting a script worth the time needed to figure out the syntax.

I simply duplicate the document as many times as needed in finder, batch rename them using Finder.

If you had 64 sections, I would use a "binary search" approach.


split the document in 2
split in 4
split by 8
split by half


I've never liked copy/paste since things get odd sometimes. Chopping out the unneeded parts always seems to work better for me, but your manual copy/paste method also will work.