Sorry, Dan... just getting a chance to look at this thread. That's a great setup and I've done something similar. Do you and your wife both fit there? It's amazing how much room is back there. I am thinking of going camping with my rover group in August, so I will need to stick everythign on my roof, as I will need a full sleeping space back there for me and the dogs.
So a couple of things to point out about these pictures:
I am on a long road trip so I have a ton of extraneous stuff in the truck including a suitcase of clothes for a business trip, a stroller I was bringing to Seattle for our new/first grandchild, stuff for our kids, a large bin of hiking stuff for myself and my wife, a large bin of camping stuff, photo equipment, etc.
To make room in this case I brought a small, instant pop-up tent. Rather than sleeping in the tent I put the inanimate cargo in the cold, on-the-ground tent and I slept in the truck.
David, my wife and I could fit in the back if I removed the other cargo. This is the reason the small tent. We also have a large tent that has a sleeve that covers the back end of the truck and thereby "integrates" with the two together. That smaller tent sets up in 2 mins and is great when we are moving from place to place. The larger tent would be better if we are stationary for a couple of days but is a large, heavy case/box so I didn't bring it on this trip.
As for you and the dogs it depends on how large they are and how "close" you are. ;-) But it could certainly work.
I really liked the idea of a small, quick setup tent to hold/protect the gear. I just made sure I could move 70% of it by movie two large cargo bins so it was quick. If a bear ventures by it can go after what is in the tent - I/we are safe in the truck.
And it is pretty cool to wake in the morning and look out those alpine roofs and big windows at a wonderful view. (Oh, I put a couple of my "hang up" clothes on hangers that I hang on the 3rd row passenger grips. I reposition them to cover the windows while sleeping.
And, finally, I am 5'8". I closed the tailgate and was fine. 6' and over may not be as comfortable.