Thanks for responding, John! That does sound like an option that could work.
Maybe this is more of a general question about acf_form, but I assume that acf_form only allows you to write to
1) custom fields created in ACF, and
2) generic WordPress fields (title, content, etc.)
Is that accurate?
If so, how does acf_form identify the non-ACF fields? If I had the meta_key of a non-ACF custom field, could I write to it?