It also largely depents on the quality and cost and serving size of food. While I dont mind a slightly higher price to help them reopen I also dont want to drop $7-10 for a food and wine size serving hitting up multipul booths and still be hungry after spending $75 for one person. They may get me one day but they wont get me back everyday where as if things are reasonable I just may visit every day they are open for this event.They were savvy in ensuring the times cleanly cross meal times, unless you prefer brunch or really early dinner times.
In theory they should be able to make money on the event, unless it gets overrun by members that decide not to spend a dime in the park. There are plenty of parks that exist at this size (e.g. most the beachfront parks) and those parks have been in business for decades.