debate camp is not necessary but its rather usefull.
I would strongley recomend going to one because there are so many benifits about them:
1. get to learn about the new topic and have some backroung information
2. by the time you come back home you already have evidience to work with and you can do addon's to them
3. you will have practice debates on the new topics so you can test out your new arguments.
Even though we are in a recession, and its rather expnsive to go to camp, its your call. but those three points that i mentioned are some of the benifits about going to camp.