I'm working on building a box blind and have permission from landowner to place it on the property. All will be done with hand tools. I'm considering elevating 4-6 feet so I can gain a little height but is the highest I could probably go without a tractor. Is it worth it just for a few feet? How far should posts be buried with just 4 feet elevation? I'm trying to place it where there is some natural elevation as well and hope to have vertical corner windows for bow. Thanks in advance for advice.