This is a small and pleasant location by the lake, offering water and restroom facilities. The owner visits daily to collect fees, and is friendly. We paid 70zl for 2 people and a van for a 2-day stay. It's a peaceful spot with access to a clean lake.
The place we stayed at was originally nice, but we encountered a lot of mosquitoes in the evening, which is common in swampy areas. We had difficulty communicating with the owner as he couldn't speak German or English and typed something into his computer. He requested 70 Zloty for one night, Monday to Tuesday, for our family of two adults and two kids, despite a different price being advertised on his sign.
The location is very nice, but the journey there can be adventurous :) It's perfect for mountain biking around the lake. However, the facility only has basic toilets. The price varied between 11 euros on Fridays and 15 euros on Saturdays for 2 people with 2 vans.