If you were senior enough, you could do it. I used to boat-sit on one guy's boat for him when he had to fly his one 4 day trip a month. That's why some guys would stay on the 727 forever, rather than upgrade and be junior. If you were senior you picked the lines with two 4 day trips that touched your 1 week of vacation. Oh, and there might have been some 'recreational sick leave' used in there too.

A lot of guys in BOS didn't bid all the summer months in the first round, many of them were more into skiing, and would bid the Christmas, Jan and Feb weeks for their ski vacations. Remember, summer up there is only 3 months long. If you were a boater, you bid summer, if you were a skier, you bid winter vacations. As an 18 month F/E I got a week in June for my wedding. I did have to fly Christmas and Thanksgiving though. Those weeks went just as high as a June or August vacation week.