One good way to help is to use the depower strap and hall this all the way in so that the back lines are loose even when the chicken loop is 'on full' - usually helps

DO chin ups in your back yard to get stronger, so that with the kite parked and flared you can lift yourself up the bar to hook in.

get a bigger chicken loop

some people use a shackle and shackle the chicken loop to the harness hook- as long at the loop has a quick release of coarse-
ive got a elastic loop attached to my hook that does the same thing as the shackle

Use a chicken bone or similar. North bar should come with one.

If your unhooked & holding the bar with both hands, fly the kite up to 12 o'clock & keep it steady. Put one hand right in the center of the bar (keep that kite steady) and grab the chicken loop quickly with the other hand & pull it down so the kite depowers, while your pulling down on the chicken loop, quickly hook it back in with that hand.