I called this week and got PS for July. I was offered three times 2:50, 3:00 and 3:10.
We have done the Ice Cream Social once before and really enjoyed it. We had 4 adults and 4 children. We had wonderful interaction with the characters. There was Farmer Mickey, Pluto, Chip and Dale. They played tic tac toe with the kids, gave hi fives, hugged them, played with the girls hair signed autograph books, and posed for pictures.
The ice cream treats were different for the adults and kids. We thought it was good tasting. It is a little pricey for ice cream but I felt it was worth it as we were able to sit down and rest after being in the park for a while and the kids did see the characters without having to wait in a long line.
I would call 90 days out at the latest because I was told that they only have a limited amount of seating as the resaurant still serves meals.