This issue comes up every year. The 8:00am limit is for “all hunters” in fact it’s for everyone, even non-hunters. – I’ve seen citations written, I’ve also seen a fist fight over the issue. It isn’t worth it.
I’ll never understand why anyone would risk a citation to sneak into a release site early, or why they would even want to hunt ducks there. After 8:00am you can expect an army of orange clad hunters and their dogs beating the brush around and amongst your decoys. And then there are the safety aspects; duck hunters are camoed up and hiding in the grass, the pheasants are hiding in the same grass - recipe for a bad day in the making.