I need some decision making help, please

So I vented in another thread that our elopement has gotten away from us a bit. We have decided to accept this and go with it, but I need to figure out how to feed these people!!!

Plan A was the two of us and our kids go to a restaurant for dinner. We have a quiet table, tucked away in the main dining room reserved for 4.

There are now 9 of us attending, so my reservation wont work. The first restaurant doesn't open until 4pm today. I could wait until 4pm and ask if they can add an additional 5 people. The table may not be so private. And if they are busy tomorrow night for whatever reason, we are in a really bad place.

OR...

Plan B - I contacted a restaurant that has a small private dining room. They are offering us use of the private dining room plus a prix fixe 3 course meal (choice of 3 apps, 3 mains, every one gets the same dessert). This isnt quite what I wanted, but I could get this all sorted in an hour and be done with it.

I really need some help making this decision and FH is incommunicado at work right now. I want the first restaurant but I am scared it will not be able to accommodate the extra people.

Word to the wise: if you are eloping, don't decide to tell everyone 2 days before the wedding, because figuring this out 24 hours beforehand is too much!