The way to use a roof rack is to avoid trying to lift the whole kayak at one time. You do this by getting the kayak’s bow on to the rack and then pushing the rest up onto the rack. That way you only have to lift a part of the board’s weight at one time. If you have any good sporting goods stores near you, go to one and seek their advice.
Libstripper has a good start.
The way to use a roof rack is to avoid trying to lift the whole kayak at one time.
The T-rack is above the spare. But one end of the Kayak on the T-rack and rotate the Kayak by holding up the other end and walking it around to the front.
This allows you to use leverage and only pick up half the weight of the Kayak at a time.
I use a modified system that I made to put a Scanoe on my Truck.
Should work for your kayak.
There are also side loader systems.
Here is a link:
http://www.roofracksgalore.com.au/kayak%20loaders.htm
That is an Australian site, but I am sure there are plenty in the U.S.
This works. I can get a 120 lb Jon boat on top of my Jeep Cherokee (by myself) no problem doing this.