Not legally, no.

Thanks for the good info. That said, this is all subject to examination of evidence and being able to prove in court that a sign had a) all the requisite info and b) was noticed, or at least noticeable. My point being that the legal determination of trespass is not the same as the non-legal concept of “don’t come on…

Funny thing is, you aren’t even right about the definition of trespass. Walking onto someone’s property without permission isn’t trespass. Trespass happens only if you are ordered to leave *by the property owner* and don’t do so. (So, even if a cop shows up and tells you to leave, you aren’t committing trespass until…