I quite sure if the thief has enough time he will get it. In this video supposedly he only needed 10 seconds. Nothing wrong with a obstacle course to navigate, but I still say a well hidden, well wired GPS tracker with a movement alert function gives you your best chance at getting your ride back. You may have to chase it down but at least you know where to look
Bottom line is if they want it bad enough they are going to get it, most thieves go for the easy stuff.
https://www.youtube.com/watch?v=WOoW2gsIIfk