[etskinner]

A Prius is one of the best compact cars you can have for this purpose, it can easily fit 8' lumber that's 2' wide, stacked 2' thick. In mine (2008), I drop the back seats, slide the front passenger seat forward and tip it all the way back, both extremely easy.

I haven't tried it yet, but I'm convinced with the right strapping and padding, and driving at low speeds on a non-windy day, you could also strap full 4x8 sheets on the roof.

You'd be surprised how many mom and pop places will deliver. And like others have said, for anything else, there's always the rental truck or a U-Haul.