The "Magic Lantern" series produces little books for each camera model that explain the features of the camera and how to best use them. You could get the one for your camera and quickly read through it before your trip. I doubt that a "cheat sheet" would do much good, since there is no standard "best set of settings" for a generic situation; every situation is different, and your goals may be different, so you need to do some thinking for yourself.
Lisa