When I was little, we each got a sparkler to twirl in the snow- lovely. We'd have special food w a silver dollar at the bottom of the dish- one for each of us. We were allowed to stay up until midnight- I don't remember if I made it or not.
Since I have been too tired to attempt even a short time at First Night, we have watched it on TV. Usually PizzaGuy (SO) would pick up Chinese take out.
Last year we were in PA w my Mom and did the same thing- actually made it to midnight.
This year we may take Chinese to P's Mom and watch some of the festivities.
None of the above require dressing up!