wrap around stairs look great and a worth the trouble of building. The trick is to make sure the steps are properly supported. The easiest way (this is also the way that takes the most material) is build box steps. You will need to level the ground around your deck for this to work. Then you will need to build a bottom step that covers the footprint of all your steps. the next step up will be one step smaller and so on. This is something you can design as you and you should be able to estimate the material you need for this.
The other way to build the steps will cost less but its a little harder to build. Using this method you will build with stringers. A person in the showcase did this and since a picture speaks a thousand words you might be best to start there. the following link will take you there. The pictures might actually make it easier to build than the box step.
deckplans.com/deck-of-the-month-april-2009
Deckman