Man I just couldn't get myself to eat a crow.. Just something about them that seems nasty, when in reality they are probably just as clean as any other game bird. I've heard they tasted fine. If you do cook some let us know how they taste.
And that's odd they don't allow weekday hunting.
The main tip I have is to be completely hidden. Camo from head to toe, and stay still if one comes in. Decoys are very useful too, really makes them want to come in closer to get a better look and not be to shy. You can make some easily. If you have some wire coat hangers just shape them into a crow and stretch a black sock or black tape over them. 5-6 will suffice.
What type of e caller and sounds do you use?