Of course, how can you go for a wild backpacking activity without a backpack! Pick one that is comfortable and fits well on you. A properly fitted backpack is essential. You are going hiking and the last thing you need is a backpack that is gouging into your shoulders. Make sure your is fitted properly.
Studies have shown that meditation does bring about beneficial physiologic effects to the body. And there has been a growing consensus in the medical community to further study the effects of such. So in the near future, who knows, that mystical, esoteric thing we call meditation might become a science itself!