i know you said that you wanted to focus on work out. but you should count calories really close and start out this week at around 2000 cals/day.
follow that for 1 week then reduce your daily intake by 200 cals. so now you are taking in 1800 cals/day for the next week.
do this up until your trip. of course by the time your trip comes around your going to be around 1200 cals/day, which is low. but stepping down like this allows you to lower your daily intake without having your body slow down its metabolism. if you drastically reduce your caloric intake, your body will slow down becuase it thinks you are starving.
i did this last year after bulking up for 3 months. i lost 25 lbs in 10 weeks without stepping on a piece of cardio equipment once.
heres the plan that i followed. my cals were never as low. but my nutrient ratios were approximately the same. discipline is key, but its the most efficient way.
http://www.ast-ss.com/jeffwillet/Roa...95&week=15