Question about non-protected use

I switched from a F-250 with an 8 foot bed to a tacoma for a forestry work truck for the time being. I run atv's a lot in the woods especially in the winter. In order to get my atv in the back of the taco, I need to get it up and over the wheel wells. I am considering a decked system to do this with the atv sitting on top of it.

Main thing I see is that I live in a place with 100" of rain a year. Will the decked system hold up to running around with a Honda Rancher 400 on top of it all the time and keep my tools somewhat dry?

Thanks

 

Also just noticing that for 17 tacoma, Decked has move to a single drawer and not a two drawer unit. That means no center support. Anyone have concerns with putting an atv on top? Mine is a Honda 400 rancher, so about 600 lbs.