For car camping – get the 3 man Vaude Equinox (can’t remember the number – the biggest one with just one sleeping area though… may even be 4 man)
It is marvelous – you can sit in the bell end in chairs, get a double matress in with acres of space to space… the bell end out front has a floor bit so you have a huge space for chilling out if the weather turns nasty – we usually have a few folk in the front with a few chairs and a coolbox of beer 😉
They are also, unlike the cheap shitey familly tents, 4 season rated – you get em up right and they are damn solid! I have learned from many nights camping in the Highlands and Islands never to take anything less than a 4 season tent… collapsing canvas on a stormy night is never a good thing 😉
Love mine, it has done us well over the last 5 years or so!