I'm in Maine, and I would certainly say our birds are running late. Part of that, for my particular property, is that the rain combined with winter melt floods a serious portion of the low areas. Until that flooding has come and gone, they don't seem to get into the full swing of things. I'm not a biologist but I'd be guessing the nesting areas just need to dry out more before these birds get down to business.
The flock/s that tend to move up the creek and through my field (and adjacent fields) haven't even shown up this year. That's not necessarily the best barometer for Turkey hunting, but my area is very heavily populated with birds--and the last week or so of April into the first week of May is often a busy time for them. They are noticeably absent right now. If you're coming North (although I hardly think of PA as "North"
) I would push that trip back at least one weekend.
Cheers,
Jimmy