Hello @hatfieldmedia,
Thanks for updating the thread. 
If you are looking for a fast Gallery plugin, then I think you can take a look at Envira Gallery plugin that comes bundled with X and Pro theme. It's lightweight, easy to use and does not has major impact on page load time. You can install Envira Gallery plugin from X/Pro > Validation > Extensions.
To get started with Envira Gallery, you can refer following documentations:
https://enviragallery.com/docs/
Thanks.