Oh man. I lost a lot of weight during my first CP. I went there weighing 112 and i came back weighing 92. I'm a small girl to begin with, so losing that much weight was not good. I didn't realized how much I had lost until I came home and actually got on a scale. Now everyone tells me how they were worried about me because I lost so much and looked so skinny. But, honestly, at the time I had no idea. I just knew my pants didn't fit quite as well, haha.
But seriously, it's not something I tried to do, it just happened. I worked at MK in fantasyland attractions. I guess it was a combination of walking, not eating enough on lunch breaks, and the breakup i went through while I was there. I would regularly just get a bagel on my lunch break because by the time you get to the cafeteria, wait in line, pay, etc, you don't have a lot of time! My recommendation is to bring your own food if you can. It will save you time so you can actually relax on break and will also save you money. Also, ESPECIALLY if you're working outside make sure to drink lots of water. My first month there I got heat exhaustion because I got dehydrated at work. I almost passed out and they had to take me backstage and I puked everywhere. It was the first time in my life I had thrown up so I literally thought I was dying, haha. They had to call the paramedics and everything. It was awful.
So yeah, needless to say my first CP wasn't the healthiest experience I've had... My second CP was much better because I was better prepared I think. Just remember to keep your health in check while you are there and you'll be ok. And if you WANT to lose weight then all of the walking and activity will definitely be a great way to do it. Just remember to EAT! haha. Those 14 hour work days can make you forget sometimes...