That's another good suggestion Ben. So there are two separate cases here.

1) Just create your own tables in postgres and connect to it as an external schema

https://www.labkey.org/wiki/home/Documentation/page.view?name=externalSchemas

In this case, there is no module required. A new schema will show up in the schema browser that you can use.

2) Create a new schema through the mini-module method. In this case labkey will run the schema creation script for you and even manage scripts to upgrade the schema. This is definitely a slightly more structured approach. If you are managing a dev machine, staging machine, and production machine. There is the advantage to having this structure.