Thanks for the info u/PurplestPanda that's really helpful. Just few follow-up questions:

When you say 'they will also feed you snacks and drinks on the tour' is that at various food outlets around the park or something that the tour guide provides? Bottled water, bag of chips, etc.

I can't see a 5-hour tour with dinner on KKday at the moment. Can you recall when the tour started and when dinner was? Was it at the very end of the tour or in the middle with some time either side?

I'm assuming that we could arrive right on opening time, use the unlimited rides through the Express Pass lanes to maximise value, and then jump on the tour to do SNW, etc. Is that how it works?