My Fiance and I are trying to have an elegant Halloween wedding. We are in the air about allowing our guests to come in costumes. He would really love it, but I fear that too many cons, over shine the pros. Some of my worries are guest not showing up to the church due to "getting ready", leaving early due to comfort, guests keeping the costumes tasteful; this is a wedding after all. And lastly security purposes, I wouldn't want strangers making their way into the wedding. I suggested that we provide some mask to make it more of a masquerade. Any suggestions?