I have an interesting area for weddings, one day it could be 70 degrees with a 40 mph wind and the next day it can be over 100 and overcast with 60% humidity. It's nuts.
Anyway, I carry a lot of peaches in my kit for weddings (and lavender, yellow, green, and peach-based concealers). You NEVER KNOW when you're going to get a bride that attempted to tan with her sunglasses here. It's nuts. So I stock up in green-based concealers (the green based primers are crap, it seems).
Anyhoo - here's a few of my absolute MUST-haves for the eyes for the pre-wedding trial... (I actually carry a palette of pale neutrals, darker brown-neutrals, peaches, and pinks. I'll also carry a mix palette of pastels if the bride requests it).
MAC Vanilla e/s (I carry the pigment, too)
MAC Fairylite p/m
MAC Goldenaire p/m
MAC Samoa Silk e/s
MAC Love Bud e/s
NYX Orange e/s (goes on very light peach, buildable - dupe for Evening Aura)
MAC Haux e/s
MAC Folie e/s (mostly as a liner)
MAC Mystery e/s (mostly as a liner)
MAC Shroom e/s
MAC Blanc Type e/s
MAC Malt e/s
MAC Omega e/s
MAC Ricepaper e/s
MAC Shroom e/s
MAC Pink Opal p/m
I carry two palettes of crushed lippies to make sure I have every color available at the trial (just in case), however, I generally narrow it down to one of six colors almost every time.
MAC Creme d'Nude
MAC Fabby
MAC La Di Bra
MAC Sandy B
MAC La Mode
MAC Viva Glam II
Blot powder/Blot tissue is also an essential, as is Fix+ (with the mostly dry air here, powdery faces are an issue without it). I also love to carry strobe cream, Smashbox's Artificial Light, Benefit's SheLaq, Benefit's Boi-Ing, and Benefit's Erase Paste. Depending on the bride's skin, I also carry Monistat Chafing Creme and MAC's Prep & Prime Face, too.