If you participate in the Box Top Program you might consider charging a set amount of Box Tops for admission fee. This would bring in a little cash and build awareness.

You can decorate with snowman (there seems to be a lot left over from the holidays) and white snowflakes made from white butcher paper. For table decorates you can use white poinsettas.
As far as door prizes I would only do it for the
people that show up. This way you get a bigger crowd. You didn't mention if you were going to sell them. If so set-up a different table. Also to you can pre-sale by sending tickets home with the kids or if you want just sell that night. You can send like 4 tickets home.

We are having a winter potluck this year called "Winter Wonderland". I am wondering if anyone has any decorations ideas for us. We are also having a raffle and we were wondering if we should open the raffle up to the whole school or just to the people who come. Any ideas? Thanks.