We used Tiffany towncar last trip. We had 3 large suitcases, 2 small, and a carryon bag. As well as 4 backbacks. I didn't think it would all go in, but it did, along with groceries. The trunks are pretty big, and we put the backpacks with us.
The trip before, I did get a van, through Tiffany, but that was with a stroller, carseat, etc.