My husband's pack wasn't 100% finished by the party, but I'd say it was 90% if not more. My brother, who was making the pack for my brother-in-law also, didn't get his packs finished in time. We all still had a lot of fun. The food even matched the theme. We had "proton stream" spaghetti, green Jell-O "slime", Twinkies, and Stay Puft Marshmallow man dessert (Mississippi mud pie cake), along with an awesome veggie pizza my sister Becky made to look like the no ghost symbol!
I had wanted to wear a Padme gown under the tulle ghost over gown, but I was rushing too fast and making mistakes, so I put it aside and wore a regular dress underneath. It wasn't as nice, but it worked.