FrH

Sorry for the late reply. You caught my website when I was revamping it - so many of these problems are resolved or changed completely. 
I appreciate your offer and will let you know if I need you! Thank you so much.

Oh, it works! Thank you so much!
Is there any way to include the image titles in there too (somewhere) or no? If not, that's totally fine

I'm currently editing the new template in Preview Mode before I make it "live". My live website (harvieillustration.com) is still in Avenue, but the template I'm working on to switch to is Wells and the code seems to do nothing when pasted, despite the image you showed it working.
I'm wondering if I have to make it a live template before doing so. Hopefully not? Other code I'm working with in other portions seems to work fine despite this.
I appreciate your patience and you trying to help, however this ends up panning out! 🙂

My current website (a different template) has what I want it to do with the Wells template, which I plan to switch over soon to.
I'm wondering if there's a way to make images in the Wells gallery stack in the same way they do in my current template (Avenue). I need the images to be one on top of the other, not on a masonry grid. 
A quick workaround to this would be simply to put my images into a blank page (not Gallery) and upload that way (solves the stacking problem), but I reply heavily on Gallery's "scheduling" feature, which is not available otherwise. 
Any custom code I could add to force the gallery to be a single column, regardless of screen size? I've maxed out the picture width to 500px, but it won't let me go higher...I'm guessing if I could, it would be the solution.
I suppose if there was an alternate template that has this feature, but allows a left sidebar navigation like Wells has, that would be ok-ish too.

There doesn't seem to be another template that offers a sidebar navigation ability, which is frustrating. I'm looking to have the navigation be on the left and ever-present, as opposed to scrolling away from it when it sits up top like my current setup is.