We're in the same boat. I have a freshman and a senior, and neither of them WANT to be pulled out. Its just too hard to catch up, and the AP courses are well beyond my ability, so no help there! We've had pretty good luck with Thanksgiving prices. I've also noticed that the short cruises over spring break (especially the Magic) are more reasonable. I hate to wish their life away, but it did occur to me that when they are both in college, we can sail the first week of January while they're still on break - CHEAP! But by that point, they probably won't want to vacation with us anymore (sad). Good luck to you!
Jodie