My Halloween Costume

So I decided I am going to be Ariel from the Little Mermaid for Halloween this year.  I am going to put on a shimmery green mermaid tail, dye my hair red, and wear a seashell bra.  Just kidding!  Am I too old to go trick or treating lol.  I heard that Disney puts on a spooktacular event for Halloween during the month of October at Disney.  I think it would be so much fun to experience something different or out of the ordinary at Disney such as a holiday, just because anything Disney doe is always over the top and magical.