In the public land I hunt, I am 99% certain that the park does not allow hunting within 100 yards of the park boundaries; they are considered "safe zones."
One thing those of you recommending trespassing are forgetting, is that you never know what kind of person owns the property. Beside the fact that landowner's rights should be respected, having some crazy-assed redneck come after you with a 12-gauge will remind you why trespassing is a bad idea. No deer is worth your life.