So my family hosted my wedding shower for me and my wife in their upstairs room of their barn.
I loved it. They were very accommodating, allowing my family to bring our own food in. All the wine was provided by the winery. Before the festivities started each table took turns doing some wine tastings at their tasting bar and picked out a couple bottles for their table.
For the person who gave their wine bad reviews, I think they are probably just trying to be snooty or didn't try very many of their wines. While I didn't enjoy them all I did find a couple varieties I really enjoyed and took a bottle home with me.
If I was hosting a similar party in the future I will definitely keep them in mind. I loved the atmosphere.