Aw Im glad I was wrong! I hope you all have an amazing time 😊

Have you asked him if this is what he wants? Not trying to be all negative but this sounds like a nightmare , especially if he didnt want to give you any names at all.

Its his birthday and the way you are wording this sounds like you're planning it without his feelings in mind.

Please ignore my comment if im looking at it the wrong way, maybe im just overthinking it... Im just worried that it might create a very lasting memory if it he doesnt want to be a part of it.

(source: I have that memory, Ive cringed over it for 25 years)