I am going to one next week and will be taking DD2 as she's only 10wks and BFing but will be leaving DD1 with a relative as she is such a full on kid, she would not sit still or stop talking.. she's only 17mths so thats to be expected.

Regarding clothes i have always found black pants/knee length skirt and a nice top with a black jacket (if cold), i generally go with all black or black and white, neat, simple and not over the top.

Sorry that you have to go to one aswell, i hope you get to say goodbye and remember some happy memories.