An update: Well, there were about 20 in the yard again yesterday. After I fired two shotgun blasts above them they left --- for about 10-15 minutes. So I fired three more shots - this time in front of them so that some dirt scattered - and they left again but did not return. So, today, we shall see if they come back. Years ago it was rare to see any turkeys at all - then began seeing groups of 5-8 or so. The past three years there are very large groups visiting regularly. We do have coyotes in the area but not sure they are doing much for the turkeys. Also have a lot of bunnies every day in the yard but those don't bother us - and they are sort of tame by now - hop around ignoring us and eating grass or fallen fruit or whatever.
Anyway, thanks again for weighing in with comments. Lets me know I am not alone and that there may be solutions.