Hi rockcow - DLP's Travel Insurance can be added to your package if you have booked a package with accomodation with them. This includes cancellation but if your traveling from the US to to the Park your normal travel insurance shoud cover the DLP part of your trip.
If your looking for Cancellation insurance especaily for the Disneyland part of your trip you are much better off looking for a normal holiday / travel insurance package. I have found 12 month World Wide Multi-Trip insurance policies much cheap for what DLP will sell you for just the duration of your stay.
Thanks jonjo! We will have to buy special travel insurance. As we own our own (very small) store, we need specific insurance in case my husband can't leave the store at the last minute. I hate to spend the money, but we would lose a lot more if something happened and we can't make the trip. BUT I WILL NOT THINK THAT WAY!