All the previous comment are correct but to add in to it the best time to go is Sunday around 8pm not so crowed. Now just for a future warning ⚠️ if you don't have a fast pass and you get in line as if you did they will send you in the back of the line and yes they do check.
You should definitely purchase online ahead of time and a fast pass, the 10 dollar one is fine, arrive around 730 to beat the crazy crowds at 9, oh and no mask is needed
It's open but the hours vary so visiting the website for that is best. I would plan to spend anywhere from $33 to $50 for this event. Regarding the masks, from what I've seen it wasn't required.
You can go to the official fear farm website for all that information.
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