For many years I loaded my 13' Revolution onto a 4-Runner by putting a towel over the rear wind deflector, setting the bow of the kayak on the towel, pushing the kayak forward onto the roof rack, flipping the kayak over onto its gunwales, and strapping it down. Then I bought a vehicle which has a thin weak wind deflector with a fragile red tail light on its rear edge, and could no longer slide my kayak up over the wind deflector. So I started getting the Revolution onto my new vehicle from the side, in the manner shown in
https://www.northwestkayakanglers.com/i ... #msg204958. This works very well, and is safer than sliding your kayak over the rear wind deflector, because the roof rack prevents your kayak from accidentally sliding sideways off your roof while you're pushing it up onto your vehicle. If using a towel to pad the side of your vehicle doesn't work with your vehicle, there are various other ways to protect the area between your roof racks when sliding your kayak onto the roof of your vehicle, such as strapping a boat strap between the bars of your roof rack, or making a padded board which sits between and/or attaches to the bars of your roof rack.
I'm a scrawny old guy, definitely not a weight lifter, and I have no trouble getting my kayak on my vehicle using this technique.