Here is how I did it when my category was undermanned. With 13 X days I would bid the first 9/10 days off and then the last 3/4 days off. If I didn't get something in the beginning to start the roll, at least I had a chance at the end of the month. All my 13 days off would be in a row. They just started 4 days before the month ended. That way I could take advantage of any carry over trips that popped up.

Denny