Today after we cleaned up all of our camping stuff, Bailey and I went down to the shop and whipped out a little drawer system for the 4Runner. The only full extension slides that we had on hand were 22" deep so that kinda limited the depth of the drawer.
Still have some storage on top:
Handle:
Still have room on the sides to reach the factory cubby holes:
23"x35"x9" drawer shoud carry plenty:
Little 16"x35"x9" cubby hole to hold coolers for beverages and snacks with the lid removed or just extra storage with the lid in place.
I may add some grey carpet later to make it look good.
Still have some storage on top:

Handle:

Still have room on the sides to reach the factory cubby holes:

23"x35"x9" drawer shoud carry plenty:

Little 16"x35"x9" cubby hole to hold coolers for beverages and snacks with the lid removed or just extra storage with the lid in place.

I may add some grey carpet later to make it look good.