So many pretty canoes in this thread so I'm a little embarrassed with this old Coleman 15', but we have really enjoyed it, pretty stable and lots of carrying capacity. Diagonally placed in the back of a 2009 Silverado, 8' bed with 1.5' tailgate, so most of the canoe is supported by the truck bed and of course it is lashed in tightly.
Hyundai Santa Fe with a Chestnut Pal and a SR Q16. I have 2 fence top rails bolted onto a set of Yakima tubular racks. Have carried one or 2 many miles with no issues. I use the side straps made from webbing that attach under the hood to tie the bow(s) to, I've never tied the stern of a canoe, it always gets it the way of the hatch