That sucks Charlie. I hate the noon whistle also!
From what my friends that hunt several states say is this;
The birds in the states that stop hunting at noon are far less wary and call shy than the birds in the states that allow all day hunting
I hunt Mississippi, Arkansas, and Missouri just about every year. MO is the only state of the three that doesn't allow all day hunting. I honestly don't think it is any easier to kill a bird in MO than it is in AR or MS. The area that I hunt in MO has a lot more birds than the areas that I hunt in AR and MS but I don't find any significant difference on how difficult it is to call a turkey up there. I didn't kill a bird in MS this year but it certainly wasn't the turkey's fault. I missed a longbeard[:'(](first miss in years). I had two longbeards at 30 yards and I was waiting for them to clear some trees so my partner and I could both shoot and some guy started a chainsaw less than 100 yards away and they took off[:'(](neither one of us got a shot). We had two more long beards at 30 yards and my buddy and I were hunting together again and he thought I had a shot at the second bird so he poleaxed the first one but I didn't have a shot at the second one[:'(]. That 3 day hunt beats my three best days in Arkansas and Missouri put together in terms of hearing birds and working birds and I have killed 2 birds in AR and 1 in MO. So I don't necessarily agree with that though I will say that MS birds are typically the toughest birds to hunt of the three states. At least the areas that I hunt are because they are 95% woods with very little pasture ground.