Many paddlers have Thule or Yakima racks, some use factory racks (many SUVs and some cars), and some just use foam blocks on top of the roof of their vehicle. I use none of the above.
Before last spring, I carried my parents' tandem using their old Ford Taurus wagon. But last winter they sold it and I was planning on buying my own boat (the green Hurricane Santee 140T). So last spring, I bought a rack for my pickup. I chose the utility rack from US Rack for it's simplicity. Unlike most pickup racks I've seen, this one just clamps onto the bedrails instead of bolting into the bed. I can set it up or take it down in under 30 minutes.
This past winter I noticed that US Rack had added a new product, the Malone Auto Loader. I ordered this item, so that I could more easily carry two boats on occasion. I didn't use it for the Flandreau cruise, but since then I am gaining more confidence in it. I actually am using the Malone Auto Loader a bit different than what their website shows. The low side of the loader is shown on the outside edge of a factory rack on a car or suv. Because I am using it with a pickup, I can set it up opposite by loading it from the rear of the pickup rather than the side.
US Rack also carries a Malone cradle type carrier to attach to their rack. Also, I am thinking of purchasing a second Auto Loader for when I get a second boat. For more information, I have a link to US Rack in the links section to the right.