Good luck to Fanny, Hamster, Run for fun, popsycal, LaLa and SLF for GNR today (hope I have remembered everyone, I copied these names from race list)
Fanny sorry about period. Grrrr.
Tulip sorry you found it stressful. As orange says the crowd should ease a bit after the first km or so. As its a half marathon, and your first, it may be useful to use this to your advantage. That is, I wouldn't be trying to pass them, but let their speed dictate your speed, so that you have more "go" left for later in the race for when it gets tougher. Am no expert, but I have usually found this tactic works for me.
Another thing I have found helpful is to get an idea of the course - is that a possibility for you? Is it a single lap? Or multiple laps? Could you run part of the course or cycle it, or drive it? I usually feel a lot better knowing what I have left myself in for (though realise this is not always possible!).
Rhet how are you doing with DP's birthday menu? Still pie, salad and cake?
Happy running everyone!