At Biscayne National Park, there are two campgrounds on Boca Chita Key and Elliott Key. The camping fee for both campgrounds is $25 per night. However, there is an additional $7 per night fee for using a campsite with a picnic table and grill on Elliott Key. Keep in mind that these fees are subject to change, and it's always a good idea to check the official Biscayne National Park website for the most up-to-date information.