It took some tweaking, mostly because I'm not very careful at the start when I'm playing with things like this, but I have it working.
At the bottom you will see a gallery of a selection of "test" images that I have put in a folder that is in my pictures folder. The pelican-photos plugin allows me to easily add a gallery based on a folder. I have used the "default" settings and made a quick modification to template to make it work.
I think that I'm starting to get the hang of it.