It is a special event offered to Tables in Wonderland Members. I believe they have had 3 of these so far. The first one was probably about 6 months ago. They just did it again for 2 nights about a week ago. The most recent one was $155 per person. I don't remember all the details but the first one sold out very quickly.
They will be offering it again as part of the Grape Getaway Package for the Food & Wine Food & Wine Festival this year. The package without accommodations is $1900 per person, They will also provide accommodations at Boardwalk Inn if you require them for an additional fee. This event is open to anyone but limited to 100 people. There are many other activities planned as part of this event over a 4 day period.