I pored over your contest entries last night (PORED), and it wasn't too hard to narrow it down. My basic criteria were: a) Do I like the dress? and then b) Do those shoes go with the dress?
Here are the five ensembles I'm recommending for our Colorado wedding guest, four out of five of which feature BOOTIES.
What can I say? I'm not a big fan of espadrilles.
from Emily (pictured above): Michael Angel Sleeveless Peplum Dress, Zara Leather Jacket, Charles Albert Obsidian Arrowhead Ring + Rachel Comey Ankle Boots
from buttercup133: Funktional Tunnel Dress, A Peace Treaty Yaluc Earrings, Club Monaco Adele Parachute Parka, Geometrical Illusion Printed Leather Pouch + Loeffler Randall Ollie Open Toe Booties
Cast your vote quickly! I'm shutting her down when we hit 500.
Note: As usual, I included no chalk/blush/white dresses, even though a startling number of you suggested them. If it's a color the bride might wear (especially at a casual wedding) it is not appropriate for a guest, mkay?