Awesome dresses ! Not dated at.all. I am in love with the polka dot one. It is fun, young, with a great silhouette and detail.
I missed the thread, I will go back and read it - where is the reunion being held ?
In my experience ( having been to 3 re unions ), it is a mix of extremes. The men are all really casual. The women have come in ball gowns ( I am NOT kidding ) to jeans and a T shirt and slides. The last one we had was at a bar type of place and some of the women came dressed for a dance club ( really short skirts, LOTS of sparkle ).
In the end, it comes down to what YOU feel good in.