Half Bed Drawer Project

Good morning from Northern BC.

About to embark on the design of a half-bed trunk/drawer project.

Similar to something like the ideas posted here.
https://www.tacomaworld.com/threads...-diy-camping-drawers-pic-heavy-thread.554249/

A few key features I need to integrate:

-No more than half the width of the box (need to be able to haul a dirtbike)
-Easily removable (secure when in the box, but removable by 1 person as needed)
-Lockable trunk style lid hatch at the top for accessibility
-Ability to add/remove dividers as needed
-Pull out drawer not necessary, but potential to add later.

My biggest challenge right now is how to mount the frame to the box. I would rather not drill into the box if at all possible. Wondering if anyone has done something like this, and if they have any ideas on how this can be mounted without drilling into the box while keeping it fairly easy to remove?

Here's an idea of where I'd like to go with the frame. Thanks in advance.