Of course he is entitled to do it. Your attitude would mean that anybody doing pro bono work would miss out on doing any work on way there or back, have to spend longer than necessary, put up with delays, arrive there and back tired. Meaning people won't volunteer for pro bono work as the effort and disruption is not worth it so the organisation ends up not getting or having to pay for services which will be worth more than 400 quid.
People are entitled to expenses if doing a favour to an organisation.
I assume you would hold Waterford hurlers to the same standards and any nights in hotels before games are not needed, no need to travel by team bus as they could all drive to games etc