I'm late to the sign party! I can't wait to see y'alls signs! Oooh, and what great prizes, candy AND a plant!!
If the winner receives a Plumeria cutting/plant you will love it! I'd consider that a double gift ... the blooms are not only beautiful but wonderfully fragrant too!
We haven't had trick or treaters at our door in a long time. Years ago the schools all started having halloween carnivals/parties which keeps the kids safer than if they are going door to door. There's usually a basketball game at the college on halloween night and I always take candy to the gymnasium and donate it to the cheerleaders to give to the kids. Some of the college kids dress up in costume and there are many parents who let their children wear their costumes to the game too.