Your camp management team can now require consumers to save their payment information for future use.
This is an advanced feature which will need to be enabled by support team. You will need to Contact Us and provide an explanatory text (with an up-limit of 255 characters). 

At checkout step, if the transaction amount is NOT zero, consumers are required to enter credit card/eCheck information to complete the registration, and the payment information is saved for future use. 
The explanatory text will show up on the checkout page as below (highlighted in green.) The checkbox of Store this card for future use is automatically checked and cannot be unchecked.