Wall grid for Gallery block

Site URL: https://victorjeffreys.squarespace.com

I'm working on a 7.1 website that has a ton of photo collections (about 15). Im trying to figure out the best way to organize it so that the client can also take it over and update the photos on their own. Now that the gallery pages exist, it makes it a bit cumbersome to keep everything organized.  I can't take a gallery anymore and insert it into a page which really helps with organization.

I just purchased the Admin UI tweaks plugin from Squarespacewebsites.com in order to implement the old gallery blocks option. However, I want to implement the wall option instead of grid and realize this is just for the summary block. Is there an easy CSS work around for this?