I have been thinking about gear storage in my 2012 4Runner. For my previous SUV (Trooper), I made a wooden gear box that fit the entire rear deck, adding rubber diamond deck material to the top so the dog would have some traction jumping in.
For the 4Runner, a friend suggested that an ATV rear cargo bag might work. I found some very nice bags made by Quadra (www.Quadragear.com).

I purchased the Skyline model and secured it to the tie-downs just behind the rear seat (I don't have a third row).

The bag is very sturdy with a double closure system (zipper and buckles) that should retain my gear in case of an accident. The bag is big enough for my tools, cables, hitch, folding shovels, etc. The Bazooka model is the same footprint, just a bit taller.
The bags are not cheap, but are very well constructed. I found mine at a local ATV shop on sale for about $175.

Although it is not as sturdy as my wooden gear box, I think it worked out well. Plus, it is easy to remove or reposition if I need the extra space.
For the 4Runner, a friend suggested that an ATV rear cargo bag might work. I found some very nice bags made by Quadra (www.Quadragear.com).

I purchased the Skyline model and secured it to the tie-downs just behind the rear seat (I don't have a third row).

The bag is very sturdy with a double closure system (zipper and buckles) that should retain my gear in case of an accident. The bag is big enough for my tools, cables, hitch, folding shovels, etc. The Bazooka model is the same footprint, just a bit taller.
The bags are not cheap, but are very well constructed. I found mine at a local ATV shop on sale for about $175.

Although it is not as sturdy as my wooden gear box, I think it worked out well. Plus, it is easy to remove or reposition if I need the extra space.

