If you register, the con will help you promote your party. You'll get a listing in the daily newszine with your party and room number. Info about your party will be posted on the ConFusion web site before the con. You can also post the usual flyers around the convention. Special party posting boards will be located in high traffic areas.
People go to parties to have fun.
The only way yours can be the best is if everyone is having a lot of fun. Figure out what you liked about it and try to duplicate it. But remember, if you advertise, your party is open to all. Each person who enters your party is a possible judge. Partygoers will be given ballots to fill out rating your party.