From my experience, in their spring flocks, hens (and gobblers) are generally pretty vocal on the roost, probably because they feel safe up there in the tree...and it often seems they are looking for reassurance that all went well for their flock-mates through the night. Once they fly down, there also seems to be a brief period sometimes where they are sorting out dominance within the flock and those squabbles can be pretty vocal at times. However, things tend to taper off quickly and within a few minutes they are quiet...or mostly so.
There are exceptions to the above. It seems there are sometimes extraneous sources of "irritants" that will set them off once they are on the ground. Things like dominance interactions within a flock, alarm warnings associated with predators or perceived danger, those squabbles between individual birds, etc. may cause a vocal outburst at any time.
Overall, though, during the day...and again in my experience...hen turkeys seem to be reluctant to make much noise. Attracting the attention of those things that are out to eat you by doing a lot of squawking is not a good idea...and they seem to know that.
