Congrats again, this will be a great vehicle for your usage.
On the topic of storage; under the rear seat in these Tundra's there is just a foam pad under the carpet. There's a storage bin you can buy (I think Husky is the brand), it comes with a template you trace out on the carpet, then cut out the holes for it, and drop in the liner. So simple, and very effective.
Here's one I installed in one of the trucks I built for work (marketing vehicle):
P.S I *might* have a tonneau cover for this truck sitting in the shop; if I do it would be a soft tri-fold (new in box). I'll try to remember to look when I am there next week, if I have it I am happy to send it to you if you want to cover the shipping.