Jimmy,
Actually, what is happening is termed the post-breeding lull. Very normal, and happening a little earlier than the past few years here in New England. The birds will be quiet for ~1 week...basically, the dominant toms are resting up and just going to their strut zones, strutting for any open/young hens. The birds you do hear gobbling are most likely younger toms (2 year-olds) and jakes. The dominants, however, will still shock gobble when enticed.
This is an opportune time to call in a subdominant male early in the morning, and to go out later in the morning and call in a bird that has lost his hens. Until the hens start nesting full time, they will still meet up with the dominant tom (who will strut) but there will be no more breeding. The hens will go off to nest, and the gobbler will get lonely, which usually occurs mid-late morning to early afternoon.
I worked in a nice bird on Saturday---didn't even go out till 10. Didn't get him close enough to beat the noon whistle though...
EDIT: Sorry, one more thing about the sightings. The hens will draw the gobblers to fields now, to feast on the emerging insects (most of the mast is gone). The hens will nest close by in thick stuff, and the gobblers will either go to dusting bowls, lay in the fields, or work into shady draws to avoid the increasing heat.
I tend to set up in the morning in small clearings within the woods, which tend to be strut zones, and then move to the fields around 9-10ish to try and call in that lonely tom. Areas with good dusting sites and water are ideal...