If you don't want GMO grain, you better find a way to triple the land avaliable for farming. It simply isn't feasible. Herbicide can be done without. But thanks to high diesel prices, which is armed robbery considering diesel is a BYPRODUCT of gas production, cultivating is more expensive than spraying. Then there's pesticides and fungicides. Without them it is extremely easy to almost completely lose a crop. There is a huge list of things that are far more unhealthy for you than grain that has been genetically modified. Focus there.