I am an ivy magnet, too. I had it so bad when I was in grade school, it was even inside my mouth. (ew) I usually get it every summer and the ONLY thing that works for me is ice. I would go to sleep at night with ice packs all over my legs :ohmy:
We have a friend who was cleaning up his yard and threw some poison ivy in a fire, he ended up with it all over his body as it traveled in the smoke. I have never seen such a bad case, even his eyes were swollen shut.