The panels at The House on the Rock Resort that are included in the tickets with panels are sponsored not by The House on the Rock but by an ad hoc committee know as the Low Key Gathering. The meeting rooms at the Resort are of limited capacity and the decision to stop selling tickets for these panels was made because of fire and safety regulations (we will not exceed room capacities). If you explore the blog further, you will find that The House on the Rock is sponsoring additional panels at the Attraction; these panels are open to all ticket holders. We are sponsoring these additional panels so that everyone attending will have a chance to go to a panel if they wish. See the event schedule to learn more about panels at The House on the Rock Attraction.
In terms of seeing Neil Gaiman--this is unrelated to the panels; he is not scheduled to attend any panels. He will be at the Attraction Friday and Saturday speaking, signing books, judging the costume contest, and celebrating with his fans. There are plenty of opportunities to see Neil. Again, consult the schedule to find out more about events where Neil will be present. The overwhelming sentiment among the fans is that they are really excited that The Gathering of American Gods is finally here.