Not many trees up here, and the ones we have would double over if I tried to climb them. Nothing like hunting from the ground and stalking your quarry on their ground. I have shot sitka blacktail and mule deer from the ground with my bow, but still have yet to hunt whitetails. I'd love to try it someday, and would like to try both ways, from the ground a from a tree.
Limiting your range with a longbow only makes it that much more difficult. Getting that close to that many deer is a success in itself in my opinion.