We also were invited to join some friends of ours on a hike in the mountains about an hour away from Polokwane. It was a two day hike (we carried backpacks with everything we needed). The kids decided they didn't want to do this yet. I think they were scared when they heard it was 21 km total!
After planting the corn we covered the holes with "God's blanket" (something that will work as mulch or ground cover) to help keep the weeds out and the moisture in.