really lightweight buggy?

[MsBug]

I am looking for a new 'car' buggy, we have a tiny car, and struggle to fit all of our stuff in there when we go away for the weekend, so it needs to be as small as possible. Our current 'car buggy' is a Maclaren which is fine but it fills the whole boot.

We use a sling when we go for long walks, the main purpose of the buggy is for dd's naps

Any suggestions? Has anyone tried one of those 'backpack buggies'?