Yeah I've been a few times doing similar and had only one bad experience with US immigration coming in from Canada, they kept us for about 6-7 hours as they had questions about why we were using Australian passports and British passports, and why we were driving through the US from Canada and then back into Canada. Bloke had a big ego and was probably bored so that probably caused most of it. Just saying it isn't the first time US immigration have been heavy-handed on the simplest of things, I'm sure there is more to this Hawaii story as well.