If it was running up the tree, it was probably poison oak. Just about the same results. If you HAVE to hunt that tree, throw on some rubber gloves, cut the vine at ground level, grab the vine and pull slowly away from the tree. Drag it away from the tree, throw gloves away. DO NOT EVEN THINK OF TAKING A LEAK until you are completely showered. IF you get poison oak or ivy on you, wash with Dawn dish soap ASAP. Then, if and when the rash shows up, scrub it harshly with a brush, then apply bleach. Sucks, but it will help dry the stuff up fast. My advice is, find another tree. Probably be some more in there you didn't notice.......