Post-elopement brunch

*long post*
Hi there! I am looking for some opinions and input on this idea please!

FH and I are eloping and it’s just us and our moh and best man. No family is flying out.
We are wanting to do a post-elopement celebration when we return, but not like a full on reception. Inviting just mainly family but a few close friends/coworkers.. so maybe 50ish people?

We were thinking:
A brunch buffet at a local (nicer) restaurant the weekend we return from our elopement.

Pretty much wanting it to be like an “I do bbq” except, obviously in the AM for brunch buffet.

Im just looking for opinions, thoughts, ideas, etc. open to anything really about this topic.

My other questions:
should we pay for our guest buffet cost? It’s about $16 a person, so not super expensive but I wasn’t sure if this is something we should feel obligated to pay for or should pay for?

Do I need a “party favor”?

Okay I think that’s all 😅 any input would be helpful! Thanks!!