-- Last Updated: Dec-25-12 6:01 AM EST --
My 4'-11" daughter has a small hatch back and halls an 18 foot sea kayak on it at times and other times canoes.
She has no hassel with any extra registration, insurance, parking, wheel bearing maintenance or trailer storing, and is very happy with her set up.
I have a Ford Escape with a hatchback, and carry two sea kayaks and one canoe
With all that said, I imagine it is a lot easier to load and unload off a low trailer