Codes are usually only available on a day by day basis. You will likely only get the code for your first night. If you read through old posts you'll find instances of people who got discounted (code) rates for only scattered nights of their stay. Unlike seasonal rates, codes have limited availability. If you check in on the last of of value season you'd get the rate right into the next season on a continuous reservation at the same resort. I don't believe that Disney handles codes the same way.