We went a few years ago, a great event for buying food to take home but sadly awful for eating there - at the time only the company with the catering contract at the mart was allowed to sell food to eat, so it was vans selling burgers, fish and chips or pork rolls.
Such a shame, could be a great event - it showcases the best of Scottish food but you can't eat it there.
If it's the same setup this year it's still well worth a visit, just take a picnic for lunch.
Hope you have a great day Castlehill!