Sleep in the car

[ATM]

Hello

I am currently shopping for a new car and was discussing this with friends - as you do. We got onto the subject of estate cars because I occasionally go camping and like the idea of the extra room for bikes and tents etc. Then we got to thinking about the possibility of sleeping in the car instead of using a tent. So ideally a flat surface of about 6 foot or more in length and wide enough for a sleeping bag. Shirley some estate cars are big enough nowadays.

Has anyone done this or tried it?

Thanks...