Extra info in event booking

I’m primarily looking at Church Admin having recently run a children’s event and had to use paper forms – a couple of things might be useful if added to the event booking form – perhaps via optional tick box at the event setup step (not all events would require this):
1. Medical/Allergy information
2. Dietary needs
3. Photo permission with ability to customise some explanation text to show on front-end (could just be a link to a page where we specify what permission they are giving, our paper form specifies ‘social media publicity’ etc).

These three could be in ‘add/edit people’ section but Medical/Dietary needs can change subsequent to registering with the site, so better to put it per event?