Also, on the preview image part, I should clarify a bit I guess.
Basically, what I am trying to accomplish is to have a single "hub" page, which links to all of my November galleries. Each gallery would be powered by a shared page (per my other post in the support forums here). So only two pages total, no matter how many galleries I wanted to show.
So, here are my thoughts on maybe how to implement it (note, I am an experienced Laravel dev, but I am still new to OctoberCMS, so keep that in mind lol).
I am proposing a new component, maybe called "November Gallery Hub" or something. This component would basically be dropped onto a landing page, and would allow you to select/filter whatever galleries (or all of them) that you want to show in the hub.
The component would use the preview images for those galleries and show them in a grid, etc. Clicking on an image would take you to the gallery page for that gallery.
Of course, you could add all sorts of bells and whistles to the component, to adjust styling, presentation, etc. Hopefully you get the idea :)
Thanks for your consideration, and I will definitely give a review momentarily!