Hi James,
Good question!
I’m afraid that any field added to the Event Tickets Plus registration form will be asked for each individual ticket.
Another idea might be to incorporate those fields in the cart or checkout screen instead. It looks like you’re using WooCommerce as the e-commerce plugin and this tutorial on the WooCommerce support site gives a nice overview of how to do that. It looks like this premium extension offered by WooCommerce will help accomplish a similar thing.
Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff