Sgt. Lard, you sound like a bit of a worrier, but that's not such a bad thing! As long as you keep asking questions and write down a plan, it'll be a real help on race day (and it may help to reassure the OH!)
in answer to your questions, there are a few unknowns as this is a new event and the wave starts aren't common In IM events. I think we should expect a few minutes to "warm up" / acclimatise before each wave, and before that we probably just have to hang around in wetsuits. If you've got supporters that can take stuff for you, that'll help. It ought to be warm enough to stand around in a wettie on race day - I don't think we'll have to ready to go from the time the pros start.
When packing your red and blue bags, yes plan for weather eventualities within reason, but you can make up your mind the day before. In my experience, decision-making is terrible in the heat of the moment, so I now try to have as little as possible in the bags, having pretty much committed in advance.
For those still thinking about nutrition, bear in mind that during the race your guts will slowly begin to shut off during the bike, and more quickly on the run. It means that if you have over-indulged on the bike you will almost certainly get crippling "gut issues" on the run! This is why it's crucial to practice your race day nutrition well in advance, particularly on long bikes and including a decent run off. it turns out you can actually only absorb a relatively small amount per hour (for me around 50g carbohydrate, but you can look it up), not enough to fully replenish but enough to keep you going. If you consume more than you absorb it sits in your guts, holding water, and is potentially a showstopper....
Good to see some solid training going on, with hilly bike rides being the common theme!
It was rather wet, and quite a lot of traffic too, I thought. How did you get on, CD? I somehow missed the prize ceremony as I was in the cafe, so didn't get to find out if there were any pirates on the podium.