I agree that if you plant the right trees for the area, they will survive. When I first started planting trees, I use to travel to them just to water them every weekend. I had to grab 5 gallon buckets of water from the creek and I would fill up buckets I had attached next to the trees, that I would drill a few 1/16 inch holes in it to water them slowly. But after I started getting more and more trees, I found it wasn’t possible to keep this up. So I plant them, water them at planting, then they were on their own, unless I knew we didn’t get any rain, or anything for a few weeks, then I would go and water them.