Hankies are a great idea!!.. Sweat is def a no bueno! Wondering how you can place them in their seats without them flying away though?.. :-/ I'm giving everyone packages of kleenex in their OOT bags but I'm sure many will forget them for the ceremony.
I'm planning on placing fans on each seat. I bought Raffia fans from OrientalTrading.com, wrapped the handles in orange ribbon and made pink bows for all of the fans, but put them on with a straight pin if the guys want to take theirs off.
My fiance and I went to an outdoor wedding a few weeks ago and trust me... Guys will def use the fans!! My fiance got himself one so that he could have the breeze.