Yes, you can do this! The motivation to be thinner for WDW pictures is great, isn't it!? I can totally relate to your "journey". I'll try to be brief, but here is my story....
I have battled my weight my entire adult life, but hit an ALL-TIME non-pregnant high of a little over 200 lbs in 2002-2003. We took our first family trip to the World in 2002 and I CRINGE when I look at the pictures. I was determined to be smaller for our 2004 trip. I spent ALL of 2003 on Weight Watchers and slowly, but surely lost 40-ish pounds. I wasn't "THIN" when we returned to WDW in Jan. of 2004, but I was very happy with myself and I can actually look at the pictures and smile. (In fact, I insisted on having several pictures alone with the characters, without the kids!!)
I gained a bit of weight on the trip, and totally lost my weight loss momentum upon returning home. Despite that, I managed to maintain about 30 of the 43 pounds until late 2005. During 2005 and 2006 I managed to gain more until I was back to within 15 pounds of my all-time high weight. I was discouraged and disgusted. Well.... fast forward to Christmas 2007 and we give the kids another trip to the World for Christmas. I am determined not to go back fatter than I was last time! I have about 15 weeks to lose AT LEAST 30 pounds.
Things started well the first few weeks, but then slowed down. I discovered I wasn't eating ENOUGH (no flex points and not hitting my daily points target). I bumped up the points intake, bumped up the water intake, and increase the exercise to 5 days a week (from 2-3 x previously) and the weight loss picked up.
I am proud and happy to report that I am just 9 days away from my trip and I have lost 30 1/2 lbs (as of the scales last Saturday morning). I am almost 4 pounds less than I was the last time we went and I have 9 more days to make that 5 pounds! I have great energy and stamina, from all of the walking/running on the treadmill I have been doing and I am feeling VERY motivated to CONTINUE my weight loss journey after our trip.
I have set myself a few other "mini" goals for when we get back from WDW so that I feel encouraged to continue my weight loss. Joining a few weight loss challenges here on the WISH boards has really helped.
You can do it! Mickey is such a great motivator. Good luck on your continued journey...........................P