Phil Munro wrote:

It may not be poison ivy. But you should learn to identify what is
and what is not poison ivy. It can look different, but generally is
the three-leafed plant. That is as far as I will go in trying to
give a word description of it.!! :-)
What you describe does not sound like poison ivy to me. But get
someone who knows to check it out with you. --Phil

That's what I thought when he mentioned the hairy vine growing up the
tree trunk--could be poison oak, could be a creeper of a zillion sorts,
but it ain't poison ivy.