Just leave strips between your planted fields. 10 feet wide and knee-high grass or weeds strips will be fine to let different family groups have their own field. I have been planting this way for years and if the weeds are higher that's great but if not don't worry about it. If you need a screen to get in and out of your stand then Egyptian wheat or sun hemp planted in the summer is fine. You can also broadcast crimson clover in the weeds so the deer will feed in late January.