Preheat oven to 350*. Mix cream cheese, mayo, garlic powder, pepper, and salt together well. Flake the crab meat out of each crab leg. Stir in the the crab meat (or shrimp) and bacon. If everyone likes green onions, mix those in too, otherwise sprinkle on top of some, and leave others without. (You can reserve some for garnish if you want.)
Butter 24 mini muffin cups and gently push a wonton wrapper down into each, you'll need to gently fold it on 2 sides as you push it into the bottom of the cup. The edges will stand up out of the cups. Fill evenly with mixture, not quite to the top of the cup. Add the green onion if you didn't add it to the mixture.
Bake 10-13 minutes (or longer) until filling is hot and wrappers are golden brown and crispy. Watch them or they can get too brown quickly. Serve warm.
These can easily be made ahead and then baked right before serving.
This recipe makes 24, but 48 wonton wrappers come in a package, so you could double it if you have 2 mini muffin pans and a lot of people to feed.