We went June 24 and were not required to wear mask. I'm not sure if you can film or not. They didn't say anything about not filming so it would probably be ok to do with your phone.
No masks, I took pictures and videos the entire time with out the flash.
The path to the cavern is in asphalt and very slippery, also some kind of steep. Wear good pair of non-skip shoes. You can take pictures and video. It is really a great tour.
No masks required. Cameras welcomed.
Thank you for the answers! We will have to go and check it out
When we went the guide told us to get our cameras ready
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