FWIW, just because you are "immune" to poison ivy, doesn't mean that "immunity" will continue.
http://science.howstuffworks.com/life/botany/poison-ivy2.htm
Nice little trunk on yours. FWIW, poison ivy can get very, very big and develop spectacular muscular trunks that can be literally a hundred years old. There are some huge poison ivy vines growing up old growth sycamore and tulip poplar around my neck of the woods.
This guy shows you basically what you should probably wear collecting the damn things. BTW the trunk he's got is in the small to medium size range.
They are also pretty rampant growers, just like any vine. I don't want one because I don't want to have to keep an eye on coming in contact with it every time I work on my trees. Also, compound leaves...same problem as wisteria.