Krazy, I've done all of the above, in just about every combination. I know they do like the jerk rig. I can work em without calling, just on the jerk rig alone.
DuckBuster, I kid you not, down in FL, having 5-7 teal (marsh areas, not big open water) makes the difference. I tested that a few years ago. Went out for 3 morning straight, in the same spot, with the same conditions and same everything with the exception of the teal. I put out 6 for the first 2 mornings and watch a flock of about 16 fly around then leave. on the third day, i put out 7 teal, and they didn't even hesitate to fly right in. I don't know why it matters, but it does, and I've shared that with other hunters in that area and their teal success has increased dramatically. Further up the flyway, that rule doesn't fit, so i go with 10-12 which seems to work well enough. As for being covered, I believe I'm also good on that end, using vegetation from behind me to blend in naturally (10 years in the military taught me the ins and outs of how to use natural vegetation to quite literally disappear). While working them, they will fly directly overhead and they are more concerned with the decoy spread than with the blinds.
As of now, I'm converting some of my hen mallards and hen pintails to drake ringneck. I'm thinking that if I have a more vibrant spread, it might seem to be more convincing. I did have a thought about spreads themselves. I haven't had enough time to observe patterns here in GA yet, but do they have a tendency to remain in like species groups? I know ducks will congregate in the same spots, but do they stay in their own groups while in an area (i.e. teal stay with teal, mallards with mallards, etc.) or will they all congregate together in one duck raft? Up in NC (location dependent) they can remain in like species groups. From what I've seen, and read, that's because NC is a wintering location and the group sizes are far larger, giving ducks in the air, options on where to set down. however, in FL, the only species that stay together are diving ducks. So the question is whether to keep my decoys segregated or inter mix them.
Most Common phrases out of a duckers mouth:
Why couldn't you have been born a duck!!!
OH S*&T, DUCKS!
Damn tweedy bird, you about got shot.
There's a whole bunch of duc..oh wait, tweety birds.
I about turned this mosquito into a duck
I just got ate up