Masquerade Ball Wedding Theme

Hi my husband and I are renewing our vows next yr and have fianlly settled on the masquarade theme. Can anyone help us with what kind of decorations would go best for this. We are planning to have the ceremoney two hrs before the reception to allow time for outfit changes because we want everyone to come in the theme outfits. Anyone with any info on things we can do let me know
Thanks
Lesley