I've done a weekly church bulletin for years, first in AppleWorks & now in Pages. I had tried having all the regular events listed in my template but would often forget to remove what wasn't needed. I went to the copy & paste from another document method for awhile. Now, someone else makes a half-page insert with the information.
It sounds like you're re-using a document for the bulletin. Since you are used to hiding unneeded text, why not set up a template with everything needed & just delete (rather than hide) what's not needed that week? Then you won't be over-writing or permanently deleting anything as the template will remain unchanged.
