For C3, we did a last minute trip. Had to get a hotel about 10 miles from RCA dome and we bought our tix when we got there. I think they had 50,000 tix and only 35,000 sold. You can probably wait till the week of and decide. The artwork at C3 was various styles including the posters used for the prequels and some wild "noncanon" art like Yoda meditating while surrounded by 3 female Jedi dressed in nearly nothing. The artist submit 100s of artworks to Lucasfilm and only a few are chosen for use. We get to see the ones not chosen as well as the ones they do.