Bed storage options help

Hey All,
I did do a search, not finding much!
Would like to know if anyone has put some sort of removable but lockable storage cases/etc in the back of the bed. Something you can lock down, plastic maybe, aside from the metal ones, tool boxes. I will be using the bed for camping, to sleep in and getting a over the bed style tent, the reason for wanting to be able to remove it Not enough room inside the truck and I do have a case on the roof rack, still looking for more room.
thanks in advance

 

Tonneau + Plano tote

 

I just looked up the plano tote on Amazon and those look good, thanks

 

https://www.tacomaworld.com/search/9752656/?q=Bed+storage&t=post&o=date

 

Check out the 108qt Plano tote at home
depot. That version has a hinge on one side making it much easier to shut and open when strapped down. Plus it’s only $25

 

Got pics of one or two of these in your truck to visualize sizing? I just looked them
Up online and seems small.