I had this same dilemma this past weekend. I ended up bringing them with us (2 car seats, 2 adults, 2 kids, 3 pieces of luggage, 2 backpacks) and it was a shit. Show. It was not easy. BUT then I caught a glimpse of the ones the rental car place offered and I was so beyond thankful we brought our own. They were disgusting and looks used and ABUSED!