Writers should be paid for visits – of course they should. A
day in a school, for instance, isn’t just a day in a school. There is all the
preparation beforehand, plus several phone-calls and emails to sort everything
out, and travel to and from the venue, let alone all those years of
apprenticeship in your craft. Hence, I rate such a day at £350 but only get
that rarely.
It isn’t all that clear cut anyway.