I have an interveiw wednsday 5/18/11 with kroger, should I mention my family vacation?

My family vacation is comming up a month after I am available for the job. I have been not called back for jobs because of my availability because of schoold. Now that summer is comming and I can actually get an interview I don't want to blow it. I am 17 and cannot stay home alone for a week. Also what should i wear. I WAS THINKING A BLACK TANK TOP A ON UP CUTE FLANNEL AND DARK SKINNY JEANS WITH UGG BOOTS. please help. I would like either emplyer opinions or people who have interviewed with kroger before.