[mnm1]

Compromise. Ask for an extra week of vacation. I got three days for the mere possibility that I would be around in case production went down. It didn't. I was the only engineer on the team at the time. Come to think of it, no different from you. Since you will definitely have to work, a whole week or even longer is completely appropriate. Ask for a bit more and compromise if you have to. But you must get compensated for this well. One day for every hour you need to work seems fair.