Display multiple galleries randomly?

Site URL: https://tambourine.com

Here's the scenario. I have album covers from my clients that I want to display on my site. Because I like the look of how I have them displayed now with 2 smaller rows and 1 one large alternating, I've created 9 different galleries with 21 images in each. Having that number is what allows that 3rd row to be 3 large covers. So stacked on top of each other looks great. Having separate galleries would also help with page load, or not? Displayed only as scrolled? I'm not sure about this.

I have installed a random image plugin (javascript) that does exactly what it should on each refresh. All galleries refresh and all the images in them display randomly.

Here's where it gets tricky. What I need is a way to display each of those galleries randomly. So random images in a set gallery, but the gallery is displayed randomly with the other galleries.

The idea is to make it all look as random as possible without having all the images in a single gallery so I can keep the different row sizes intact.

Also, I would be eventually looking for a way to block the images altogether on the cellphone version but I can cross that bridge when I get to it.

Any ideas on how to make this all work?

Roger

Seems as though I have discovered a scenario to which there is no solution. Do I win a prize?