Las Vegas Wedding Attire?

[Regular Joe]

My niece will be getting married at the Flamingo in mid-July. It'll be a somewhat traditional wedding (bride in formal wedding dress, groom in a tux) but "Elvis" will be performing the ceremony. Back east, everybody getss all dolled up for a wedding. On the west coast, it's all pretty casual. What about a Vegas wedding? What would be considered "appropriate"?

Thanks,
"Joe"

 

[boilermaker]

Just went to a Elvis -Vegas wedding last month. Buddy from work got married for the third time. We all wore suits and the ladys wore nice dresses. Seen some other weeding partys out and it seems like most were dressed up. Hope this helps.