Those packages don't save you money to being with, but if you go to disneyclub.com and follow the links, you end in a page where you can book your vacation with the DC discount, which is not much, and you have to buy a package anyhow.
The DC membership is good if you shop at the store often. You get some Entertainment discounts with it (can't book hotel rooms in Orlando with the Entertainment discount, however) and the occasional perk.
Wanda