Air & Foam Camping Mattress, Self-Inflating Sleeping Pad

Exped is awesome, but OP might save some money by going with a knock off, like Lost Horizon. I've slept on both and didn't notice any meaningful difference in quality. https://www.amazon.com/LOSTHORIZON-Camping-Mattress-Self-Inflating-Sleeping/dp/B0DSVSXGHG?th=1.

Since you're just planning to car camp, and not backpack, then get a self-inflating foam camping mattress. You can get the Lost Horizon on Amazon in the Single Slim size 62"L x 26"W x 3"T

Lost Horizon comes very close to Exped as far as comfort, and it's right around the $150 range.

Lost Horizon is what you want.

Exped is the current king of the semi self inflating mattresses but there are other worthy considerations which are more affordable, especially on sale. I went with a Lost Horizon I found on clearance for half price. Probably not as bomb proof as the Exped, but after about a dozen trips this summer it’s going strong without issues. The bottom line is these type of mattresses are exponentially more comfortable than anything else on the market. I will never go back. The only drawback is they don’t roll up small.

4 inch inflatable foam mattress, a double works for two people lying basically side by side which means not a lot of room to move. So if you move quite a bit in your sleep you probably want a double + single or even two doubles, but that also means you need a larger tent. On a budget you’re probably looking at Lost Horizon or Hikenture (both available on Amazon), and likely at the pump sack versions. If you have time and can wait for a shipment, you can try Mountainhiker on AliExpress, a double with the air pump ranges from $110-130, check different shops for the best price.