Honestly I'd say to go with a different company than Camp America - I didn't have a good experience with them though that could be rare. I was circulating from early november and still hadn't heard anything by january, so I went to a recruitment fair where I found out that most camps only want people who are over 21 and/or have an actual qualification in their skill. Even to be the camp photographer (going round taking pictures of the campers) they wanted you to work as a freelance photographer as a career.
I'm in Scotland, so the costs may be slightly different, but it was going to cost me a good Β£1000 - I wouldn't have even broken even with the pocket money, I'd have lost money. I know that you don't go for the money, however I wasn't overly keen on losing money. The visa cost Β£120, plus the travel to/from the embassy (I would have had to go to Belfast), travel to/from the interview, travel to/from recruitment fairs if you go to them, the police check, the medical check, the travel costs to/from the airport before/after going to America plus the required $600 support funds you need to have.
I ended up not going because of the disastrous recruitment fair and because I got unconditional offers to go to uni so I did that instead. Just be careful that you know what you're getting into and have at least an extra Β£500 to what they say you need.