I mostly fish on my own and have no trouble using the kontiki this way, with two it is dead easy.
PS : Just a bit further to the kontiki drag and drop item. We have found that a mintie used as shown in the photo above, works better the a barley sugar for a release.
The minitie or barley sugar is wrapped in a piece of panty hose. The loop in the dacron cord is 5mm diameter. The cord works better than a wire loop - takes longer for the candy to dissolve.
I have heard that hard soap is better still but I haven't tried it. If the release is placed down by the hook - stopper line the drop line from the kontiki comes back with the kontiki, and there is no chance of it tangling with the hooks.
Using a kite for drag and drop also works well. It uses much less beach space and greatly reduces wear on the kite. A power winch or capstan is an advantage of course, but isn't necessary.
An accurate timer is always better than a candy type, particularly if the line is going kilometer out. The ideal is to drop the line exactly when the motor in the kontiki stops.
Perhaps you could invite designs for release mechanisms and publish them in the newsletters.