Thanks for the response, Bob.
I'm wondering if I'm doing something else completely wrong.
When I remove the offensive settings being flagged in that first set of errors (the lines setting hidemenu, cacheable, searchable, published, and richtext) and take out my additional TVs, I get the following entirely new set of errors:
You wanted to display a TV, but this template doesn't have it: `pagetitle
You wanted to display a TV, but this template doesn't have it: summary
You wanted to display a TV, but this template doesn't have it: content`
Again, that's using this call:
[[!NewsPublisher?
&show=`pagetitle,longtitle,pub_date,summary,content`
&initrte=`1`
&initdatepicker=`1`
&rtcontent=`1`
&rtsummary=`0`
&parentid=`18`
&captions=`content:"Body Copy",introtext:"Summary",pub_date:"Release Date"`
]]
The template in question seems to be set correctly, so I'm confused...