When Illinois closed a dozen state parks a few years ago, under blago, those who ignored the closed signs got fairly heavy fines and some returned to find their vehicles had been towed.
Obviously, I'm not a lawyer, but cutting chains, etc. to gain access, as some have suggested on other sites, might open you up to criminal prosecution-criminal trespass (?), which could affect all portions of your life...like firearm ownership.
I'm not saying I agree with this BS, but it's just something to think about before throwing a temper tantrum and getting into serious trouble. After all, only our elected officials can act like spoiled 4 year olds and not be punished for it.
Internet lawyers, like brig lawyers, advice is worth exactly as much as you are paying for it.
Semper Fi, Marines
Casey 1997-2011 RIP