It's all a guy really needs
I had to stash everything in my trunk today because I had a mechanic appointment, I thought I'd share my "setup' as I'm putting it all back together.
Behind the driver's seat is my bag of clothes, beside that is my bag if food. Behind the passenger seat I have 3 Jackery's - the largest being 1000wh - used primarily through the winter for my heated blanket, otherwise to charge my phone and vapes. I charge with the car via the 12v outlets.
I have a large Jetboil which I love, I cook ramen all the time in the car. There's an emergency bucket that fits in the rear passenger foot well nicely. Upfront I have a large lunchbox sitting in the floor for my odds and wares.
With that black blanket spread over everything in the back seat, it's not obvious looking through the window at all, it just blends into the black interior of the car. My rear seat does not fold down but I have a pass through. I keep my dirty laundry in the trunk.