Trying a few soft clucks at first should get you going.
Of course, you could empty the vest and leave all the other calls in the truck....I would imagine suction calls would quickly become second nature by noon time...
"So much of this business of hunting turkeys, you stupid it up right at the last.
You do everything right for an hour and a half, and then you sit down here
and there's nothing you can do about it, you made a mistake."
Tom Kelly, [i]Turkey Tales