Monstar-My traps are nothing special.I plan on posting a pic in a few weeks when we get our digital camera back.
Power cleans hit the legs,hips and and especially the back with an emphasis on the traps.Oly lifters use these and their backs are massive.A high pull is similar to a deadlift with a bigger range of motion.There are two "pulls" involved, just like the power clean.The first pull is from the floor to the knees, and the second pull is from the knees to about chest level.The first pull is done slow and the second pull is done explosive.A dynamic shrug is basically the second pull of a high pull, but instead of pulling the bar to chest height, you pull it to just above the belt level.This allows alot of weight to be used.All three are good trap exercises and there are several variations to each exercise, which include using a deadlift grip(called a clean grip) or a wider grip(called a snatch grip).There are a few websites that have detailed pics and explanations of these exercises.Let me know if you want the addresses.