Dennis,
You can use the autopark system that I use on my Wave. I attach a shock cord at the center of my aft beam and tie it or hook or however you want to the tiller arm to keep the tiller over on the side you want. The boat will just oscillate back and forth and rarely tack itself unless there is a really major wind shift. Meanwhile, I can walk around on the boat and make adjustments or take a nap or whatever.

Also, by using a bungee cord, if the boat defies you and tacks itself anyway, you are still able to control the tiller, because it is just a bungee holding it over. Don't use a hard line.