Update from Ashlyne:
LOL Ya, I thought I WAS adding on extra spaces when I made the reservation for 30 (at the time, we only had about 20 definites) but boy did it fill up fast! I'll see about extending the reservation, but first I want to have a better idea if it's going to be like 5 people, 10 people... or more.
The lady I had talked to said that for large groups (like us), they typically require a group reservation, which means ordering from a limited group menu, paying it all on one bill and knowing the exact number of people that will be there. I'm sure that's to make sure they can set everything up without having to add on or take away extra tables last minute, making sure everyone gets their food within a timely manner and not driving the waiting staff crazy with having to process so many bills. They're a busy place, so I understand that and big groups can be a hassle even if it means extra business. But they're being very gracious by letting us do this without the group restrictions -- I don't want to be a nuisance by emailing them daily to add another person or too.
So I'll take down any interested persons till mid-next week. That still gives them a week's notice. I think adding on a few extra spaces is a good idea, just in case. We might end up being broken up into two big tables depending on the number, but as long as we're all there together and eating at the same time, we'll still be able to chat with each other.