when you are on that hill make sure no one is behind you (other cars,people ,small woodland creatures etc). That way you won't be as nervous when you are rolling backwards . Before you do the hill you might want to try a to find a parking lot that has a slight rise to it. That way you will get the sensation of rolling backwards but it won't be as steep as a hill.

ronin
btw it would be cool if honda had a hill holder system like subaru does,it doesn't allow the car to roll backwards on a hill(hence the name).