You can probably do anything for the right price.
I concur. You should ask. If it's wedding and for personal use may be allowed. there are guides everywhere on the premises so the chances of you being able to set up and take shots or direct someone are low. also keep in mind that you can't really take any sort of photography during the tour all because they're rushing the tours in every 10 minutes so they they want to keep the group together so it doesn't back up the other group however when your tour is done you can or rather you are free to walk around the external premises for as long as you like and get on any bus going down the hill.
You can take pictures, but have to get permission to post them on Media. As for a photo shoot I would call the info center.
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