Hi I'm plannin a trip for probably next summer I was wonderin if you guys have some sort of like day pass or somethin of that nature and how much it would be per adult and per child

It's free but best to look at tours and possibly book a cabin https://www.seattle.gov/parks/find/centers/camp-long

Katie, Camp Long is a public park and there is no fee or pass needed to visit and walk around the park's trails. There is only a fee of you want to rent a cabin, picnic shelter or indoor space at the lodge, and you should call the front desk to reserve that if you wish