I have the exact same problem.
I am on Seasonale (generic) and my period is due this coming March, during my week of vacation.
The poster Eiri did not exactly answer the question, though. I understand why it would not be a good idea to skip pills on a 21 day cycle but Seasonale is an 84 day cycle.
Can I skip a week of pills on Seasonale, basically giving myself a 70-something day cycle and getting my period a week before it's due? And then on my week of vacation, I start a new cycle of Seasonale pills..
I don't want to just skip my period in general and start another 3 month pack because I will spot like crazy...