Hey, and you can leave the guilt behind too. The Roman Catholic Church has no official stance about crossdressing (other then the practical example of how the pope dresses). It has plenty to say and then some about sex, but as long as crossdressing or dancing does not lead to sex (well, except with your wife, which is OK) there is no prohibition against costume. All Fools Day and Halloween are in many ways church based, if not church sanctioned, events to some degree. In fact, not a small amount of Catholic ritual is costume based. Different vestments and colors not only give order (the difference between Dominicans, Franciscans, et. all.) rank - special hats for bishops, cardinals, and popes - but also clue as to the Ecclesiastical Season or holiday - purple for Advent, and so on.