I've had Seawings with a stinger for a long time as well as J racks and Hullivators. From my experience they are the rack that's easiest to load solo if you're not very big/strong. The benefit is you only have to lift one end of your boat at a time. Even with Hullivators you still have to curl your boat into position (If you're strong enough they are awesome). When my daughter built a lightweight boat she still struggled to load it herself onto a J rack on her Focus Wagon. I bought her a seawing/stinger combo and it's no issue now. Wheel kayak to car, set a piece of carpet behind the car, set kayak on an angle with tail on the carpet, dress straps in seawing, deploy stinger, unstrap kayak from dolly, lift front of boat into stinger, walk hands down boat (pressing down) so it doesn't skid away, lift stern of kayak off carpet and shoot it up onto the Seawings, throw straps over top of kayak and strap it down, tie off excess strap, push stinger in and tighten, bow and stern lines and you're done. We used to use a pair of Seawings with only one stinger. Once it's up it was easy to transfer the boat over. Do buy yourself some decent straps with rubber covered buckles so you can throw them over the kayak without fear of chipping any paint. The straps ours came with weren't great.
