There are, of course, parts to any day out like this which are simply unavoidable. There will be some queuing and waiting around, not helped by the unrelenting heat and sun. There will be some hand-holding as you manoeuvre through the overwhelming crowds. And there will be certain sounds and smells that trigger anxiety. You just have to navigate those things as they happen - and even then, whatever you do, whatever the provision, everything can become a bit too much.