There is only one costume that will not get you in trouble this year - YOU. Oh, wait, if you get in trouble all year round, Halloween will be no different.
It is my professional opinion that two-day-weekends are just too short for us to reset, do stuff outside of work, have fun and prepare ourselves for the new cycle of madness. With three-day-weekends, we would be in a better than "It is Monday again?" frame of mind on Monday. We would be more motivated and happy.
Do you hate check-out lines at the stores? If so, have a read. You might find out how to bypass that.