If there is no system of time slots for rides or anything else, and it's a free-for-all as per normal, I can't see much beyond say 3,000 working.
Incidentally, they canned the early-November days because this was the sort of attendance they were getting. Assuming that was loss-making, then I am not sure how they will be able to proceed viably.
Also, I think the massive thing not really being considered is now many people will want to go under the described conditions, and in the current point in the pandemic. I can seriously see the numbers being in the hundreds on any given day, and I'd have to ask how viable that is.