Get dressed up crazy for the scavanger hunt. Wear a hat, with all sorts of crazy bright stuff sticking out of it and a crazy T-shirt or something. Then put camoflage paint on your face. You face will be harder to make out really, and people will tend to look more at the crazy colorful stuff instead. If you are acting a little strange people won't notice too much, because you will look strange to begin with. You'll be covering up your high and bringing people's attention to other things. Even better, try and get a group to dress crazy so it will be even less noticable. Anyone ever go hashing????