Only very few of those 'KC things' are multi-hose and few have a centreline hose.
There'll be only one reason why the Vintage Airliner Force is taking back that schedule. Cost. But the crews will be glad to go somewhere which isn't just sodding desert.
No doubt when the ageing FunBus has been squatting U/S on some aerodrome or other for a few days, the decision will be reviewed.