The best camping chair for couples anywhere-
https://www.amazon.com/...-Chair/dp/B015GXTD58 I was able to find it on sale somewhere for $50. There's a huge difference between the low and not-low variety. Get the low.
A hammock and straps are a must to keep the wife happy while I am out MTBing.
We have a bunch of REI stuff. Winners are the Kingdom 4 tent, Kingdom sleep system, and REI Screen house (invaluable in buggy areas). We have the garage attachment for the tent if it is especially rainy. Keeps all the drips out of the tent and provides an alternative seating location to the screen house. If we had kids, I would just double up on the Kingdom 4 tent. The Kingdom 8 is huge, but doesn't provide for more separation than a single nylon wall.
I will partially prepare meals at home and throw them in the cooler. Brazilian steak or chicken, hamburgers, and brats are staples for dinner. Lunch tends to be sandwiches (or clif bars while on the trail). Breakfasts are done on the dual burner stove (Camp Chef Everest). Pancakes, egg scrambles, etc.
A good cooler is a must. Good doesn't mean you have to buy a Yeti. There's great coolers by Rubbermaid and Coleman that work fine unless you're in bear country.
Solar showers are great for sites that don't have running water (most of the time for us.)
We're both teachers, so we spend much of the summer out and about. The above keeps the wife happy, and much of it has been picked up over the years in response to particular situations (mostly weather). All this, plus fuel, wood, biking stuff, clothes, and the dog fits in our Mazda CX-5. We've even made room for a passenger in the back seat.
It's great to get out and disconnect. People can scoff at car camping, but it allows us to get out and see/ ride places without hitting our budget. And it forces face time. We're much closer after summers camping.