I've been there just once in Slupsk, but noticed the organizers are really friendly and professional. I will definitely go back.
A tip if you are coming from a neighbor city as Gdansk is to try to go by bus, the trains are really crowded and slow.
Another option is to try to get in touch with the dropzone and arrange some ride. Last time I got a ride back to Gdansk in a van from the DZ without any cost.
The snacks in the bar are really good :)