dont know of any specific camps as such but you might want to try the volunteering section of the RSPB website- they do a lot of residential wardening opportunities -highly recccomended by me!!(not sure how old you are- these would be over 18 I guess). Also have a look at the National Trust website- they have residential opportunities and I am sure that if you have a look at the websites of most major wildlife/conservation organisations you may find something there also- or give them a ring- they often have things going on that are not on their website and if you speak to them and state when you are available they may have something.