Or building on Greenie's suggestion go dressed in solid color......with a set of 'ears' (cat, mouse, rabbit, dog, devil etc) that you add before while driving to the party, perhaps some eyeliner that can make quick noses and whiskers too.
BE CAREFUL on the door knocking! Because of bad people most people don't trick/treat anymore D2D rather they attend a community or church organized event that has booths were the kids 'win' prizes that include candy!
If you are bringing the kiddos, they are going to naturally want to share their fun with family so be discerning. If the party is before Oct 31, it can be called a costume party or you can claim you didn't know what was all entailed (which is true).
Have fun and explore your own opinions!