Transcribed Parish Records in a book imaged online

Hello, jmcavanaugh. Let's see if we can simplify this for you. You have two things to cite:

1. The book, as published (and now imaged).
2. The website that delivered the images.

Each of these go in a separate layer, separated by a semicolon. Your identification of the book's specific page and content should go in Layer 1 with all the info about the book.  Your Layer 2 will not include any details about the book itself. 

(The editor is away for a few days so I thought I'd jump in and give my opinion)

I like the changes you made. My own version would be slightly different (changes in bold):

The Parish Register of Christ Church, Middlesex County, Va. From 1653 to 1812, transcription (Richmond, Virginia: National Society of the Colonial Dames of America in the Commonwealth of Virginia, 1897; reprint, Baltimore, Maryland: Genealogical Publishing Co., 1964), 64, christening of Zacharias Gibbs, 01 Feb 1704; digital images, Familysearch (https://www.familysearch.org/library/books/records/item/556813-the-parish-register-of-christ-church-middlesex-county-va-from-1653-to-1812?offset= : accesed 3 September 2023).

Let's first look at the role of the National Society of the Colonial Dames of America in the Commonwealth of Virginia. They are mentioned on the title page as the publisher, not the transcriber. The transcriber is unidentified. So I dropped the Dames as transcriber and added them as publisher. Since we'd then lose the important fact that we're looking at a transcription rather than, say, a facsimile production of the original images, I added "transcription" after the title.  We actually have two publishers: the Colonial Dames who originally published the book in 1897, and the Genealogical Publishing Company, who reprinted it in 1964. See EE 12.79 for details.

In the parentheses of the publication, we put the place where it was published before the colon. For the reprint, that's Baltimore, Maryland, not just Maryland. After the colon, we put the name of the publisher. The publisher is "Genealogical Publishing Company" not "Baltimore Genealogical Publshing Company." I would drop the p. in the page number to fit Chicago Manual of Style that Evidence Explained is based on. Unless there are two Zacharias Gibbs christened on 1 February 1704, I would not include the parents in the citation. The contents of the source go in the main text, not in the citation. The title of the website as shown on the website is FamilySearch, not Familysearch.org. 

Since this is a published source that can be viewed in many different locations, you could even drop the whole second layer. I personally include the second layer like you did in my research notes, so I can easily find the book again. I would then drop the second layer for publication in a journal or book, to save space.