I just reserved a full size car with National for 10 days in December. I put in the Disney Club contract code, and a coupon code for $20 off from the new Entertainment book. The total price, including all taxes and fees, came to $180.00. The cheapest I had found previously was $198.12. My question is, is it ok to use this coupon with the DC discount? National's system took it and gave me a confirmation, so I think it's ok. I just don't want to have trouble when we get there.