Complex sentence: Swimming, camping and contamination of the water are prohibited, and a permit (available for free online or at a kiosk at the north end of Hemlock Lake) is required to fish or boat on the lake.
Split into simpler sentences: Swimming, camping and contamination of the water are prohibited. A permit (available for free online or at a kiosk at the north end of Hemlock Lake) is required to fish or boat on the lake.