Always a bridesmaid ... again

Amber is getting married and in celebration is riding around town on a school bus full of her bridesmaids, all of whom are dressed up in white with fancy headpieces on. Amber's dad is driving the bus and I'm trying to catch it in town but I keep getting to the wrong spot or missing it. Finally I am just standing near a curb next to a parking lot and the bus comes to a stop beside me. I can't figure out how to get in and won't go around to the other side, so Amber's dad does a huge U-turn in the middle of the street so that I can get into the bus without having to step into the street.

Once I'm on, the atmosphere is a little uncomfortable but celebratory. Amber seems excited at what's happening, but I can't recall who she's marrying or who any of these dozens of bridesmaids on the bus are.