When you are out hunting and need to set down your backpack or other gear it can sometimes be a challenge to find it again. A great way to make sure you can easily find your stash again is to mark its location with a flag like the utility companies use to mark underground utilities.
They are very visible and can be rolled up for easy carrying. Check your local building supply store for these flags. If you can't find them check with your utility company. They will gladly let you have one or two. Just don't take one that is already being used to mark utilities, the fine would probably pay for another hunting trip.