I keep a print out with me and note on it after using credits. Plus you can stop at the front desk as much as you need to to get a print of our how many credits you have left and where and when you used them. I too think the
DDP is a great tool. I am helping my DIL plan a trip and she makes your group look small. She has 10 kids (all adopted), plus is taking her mom and neice. So 3 adults and 11 kids with one of them special needs. She and husband went with us once 7 years ago before any kids, so she is trying to make this a great trip for the group. My advice to you and her is to make those dining reservations at the 180 mark.