You should have a project binder available as part of your display. Remember that all your raw data and observations did NOT go in your 5 page report? Well, this is where all that data and those observations should be.
Your binder should be somewhat neat, but it won’t be a work of art. It should contain your rough notes, observations and data. It would be good to have dividers of some sort that indicate the contents. Don’t rewrite notes and data sheets, rough is fine for the binder contents.
The binder is evidence of the process of your project.