L.R.
I know you're excited about her first birthday but she will only be one. Any party is for the adults, not really for her. I'd keep it simple and just for close family or friends and do it at home. Themes will mean nothing to her though they're fun for the adults to decorate around. Not trying to quash your enthusiasm here, but as the other poster noted -- at just barely one, many kids will be either a bit freaked at a large party in a strange place, or will quickly be so overtired they'll cry or fuss the whole time--no fun for anyone. If you want a theme, do it at home with some simple decorations and a cute cake and take a lot of photos. By the time she's four she will be wanting bigger parties and you can go all the way, but at one, I wouldn't spend the money on a party venue.