No matter how tucked away that spot is, you can't pull the wool over the eyes of an experienced criminal. Instead, leave them in the care of a trusted neighbor. If you're concerned about the possibility of needing those keys when your neighbor isn't at home, make a duplicate set for another neighbor as an insurance policy. And never carry duplicate sets around in your purse, your briefcase or car. Those hedges in front of your home that are steadily growing up the side of your house should be trimmed.
Burglars love the visual protection they provide.
High shrubs, hedges and other vegetation make it possible for burglars to enter homes from the front. They can easily break windows and crawl inside your home without being detected by neighbors. But while we're on the subject of shrubs, don't abandon them completely. This is an inexpensive security system, so to speak, for your home. Burglars will gladly move on to another target house because no house is worth subjecting themselves to multiple sticks and pricks.