Hi Nora, sounds like a great event to get the word out. Maybe you can print off some of the flyers about the house raffle too, you can find them the opening pages.
One great, easy, fundraiser if it's legally OK in your state is a 50/50 raffle. Your only cost is the tickets. The way it works, in case you haven't heard of one, is you sell tickets and however much you take in you get half, the winner gets half. With a big function like you will be at, the drawing should be during the event, but they don't have to be present to win, checks are easy to mail. $1 each or 6 for $5 is what we sell them for, most people buy at least $5 worth, some $20 or more.
Good luck, Anita