If your place hasnt been hunted before on crows, you should be fine.
Just turn the foxpro on and off every 10 minutes for 5-10 minutes.
When you turn it on put the dead crow on.
When u see a crow in the three far away, turn it off for 5 minutes and proceed with the dead crow.
Before your first crow in the morning, turn the device on low volume, as you dont want the entire mob at once.
Throw 2-3 decoys in the trees attached to a fish line and weight.
Full camo and hide just outside a treeline.
Dont let a cripple on the ground walk away, new crows will flock to hum.
Have fun, its a blast.
If you had metrogun with metroshells, it would be better for your second time, as noice is reduced by 80%.
On your second try, crows will associate the gunnoise with trouble.
Use tons of chiggerspray.