Last year, which may be the last time I do a bridge run for a long time, it turned out to be a beautiful day. It was one 60' yacht, a 30sih foot sailboat and myself. It was a pleasant change from the outbound run of 20+ boats and pouring rain. That day was a lot of fun, boats all over the place but surprisingly not chaotic.
We've seen bridge runs take upwards of 6-7 hours. The fastest we've seen is 3.5-4 when we were the last boat of the season and it was just us. I like heavy weather sailing so there's plenty of good days late in the season for that.