G'Day Kep,
I'm very sorry to hear of your wife's illness and pray that she will make a speedy and complete recovery.
I'm sure trips in your Tandem will be very therapeutic.
I found early on with our Tandem that it worked better if I loaded the kayak by myself.
I am able to load ours from the rear of our vehicle, picking up the bow, resting it on the roof and then sliding it up.
The trick of course is to pick up one end only.
Have you tried any of the side loading options? We have this available locally
I'm sure there would be other options available to you over there. The Hobie DVD shows some type of pull out bar.