The Galway races isn't what it was, time was it there were scores of helicopter flights flying into the Ballybrit. But many didn't originate at Galway airport. They tried to cash in by demanding a fee for ATC coverage. That was then and this is now. Last year, there were only a few helicopters. It was really quiet.
Galway airport is in trouble, it's losing it's subsidy and route to Dublin. They will welcome any traffic. You won't get hangarage and fuel costs are quite high. There is something of a question mark as to whether it will continue as a regional airport right now or indeed whether it actually remains open.
So quite frankly you wil be welcomed for race week.
There is an alternative in Craughwell but unless you know the owners, it may not be viable.