We have two ways to access the storage under the bench seats: a front door and the top under cushions. To help organize this area I put a slide out separator so we can store more usable stuff in front and have more long term storage of stuff in the back. A 2-hour mod that made the wife happy.
I glued small wood pieces to support the panel separator on either side.
For us, extra blankets in the back, and more kitchen "stuff" in the front.