Whilst we appreciate any payment (big or small) that you are able to make towards attending Camp, we also strongly believe that everyone should have the opportunity to attend, regardless of their financial situation or background. This means that no camper will ever be turned away for lack of funds. You simply pay however much seems appropriate to you and your specific circumstances. 
There is a suggested fee of $200 to attend Camp -- this amount covers the base costs of food, accommodation and transport for each camper. Sliding scale means you pay according to what you can afford. So, if $200 is out of your price range, it is up to you if you'd like to pay a smaller amount, or to attend Camp for free.
Likewise, if it is within your means to pay more than $200 for the camp, then that is also appreciated, and this money goes towards making camp an excellent (and affordable) experience for everyone.