I've only just tried camping inside my new truck, so I don't have a lot to share (i.e. no pictures); but from my past experiences, I use this
rechargeable fan for creating some airflow at bedtime, and I will usually open the windows and cover them with a towel in the door to allow more circulation and moisture relief (the towel is to keep the bugs out). I think I will try to find a way to make, or buy, a
magnetic screen for the rear window. That would be excellent for helping to stay cool in the summer. I had something similar in my old VW van with snaps that covered the rear hatch.
I also use this great, cheap
rechargeable lantern for lighting, and I carry a outdoor
propane fire ring for warmth that uses the same propane tank the
stove does. I find it takes less room than carrying wood, and doesn't have the same issues with sparks and embers [and smoke] in high fire risk areas. (I've also gotten tired of always smelling like a campfire when I camp.)
From my first trip, I think I will forego buying an awning in favor of a popup since it is more flexible for me in the outdoors. When possible I can always use my tarp and rope to build an awning by tying it between my truck and available trees. (or even tie it between the truck and the popup for extra space.) I still want to see if I can make an awning with just my tarp, rope and fiberglass offload whips - I think it's possible. For now, my large
SUV tent can fill the role of the popup/awning.
And as far as awesome accessories, I think the
Road Shower looks like a must-have for me. A lot of the camp sites where I like to go have bathrooms, but no showers, and this toy looks luxurious compared to my old solar shower bag.