all three of these spots I mentioned are illegal. You are not going to find anything around here legal except Marshall Creek which is boring and not worth the $5 they charge to get in there.
These spots are off limits but if you go back in there and don't cause a bunch of havack (drinking, smoking pot, starting fires, bla, bla bla) then you shouldn't have anty issues. Most cops are cool about it if they see you aren't causing trouble. But, there is always a chance you take going into these places.
IMO, it is worth it. I have ran into cops out in Benbrook, and they basically said we don't care but someone complained. You have twenty minutes to leave. If you come back make sure no one sees you.
Go at your own risk. I do.