If you are even moderately let alone highly allergic/sensitized to poison ivy you would be risking ruining your entire hunt. Poison ivy can long term contaminate anything or any gear it touches and continue to give your a rash.
My friend who in his words is "immune" to poison ivy knowing allowed the wrist strap of his release to come in contact repeatedly with a huge furry nasty poison ivy vine while hunting out of his tree stand on day two while we were on a 6 day peek of pre-rut bow trip. Same guy felt it was financially imprudent to buy a second back up release aid. Utter and complete poison ivy rash induced misery doesn't even approach the level of discomfort he soon found himself in.
While I am not immune to poison ivy I am not all that sensitized either and have to make direct contact with it to get the rash, I would never hunt in a tree with poison ivy as I have had only a few rash out brakes and can not imagine what a really bad rash would be like. But my other very good friend did. His BIL asked our help to clear a lot he bought to build a house on. I showed up to help with my three Sthil chain saws in tow. two 16" and one 20" and once I got within a few feet of the tree they had just felled and were busily cutting up I hit the brakes and did an IMEDEATE about face and put about 20-30' between me and them.
The tree they had felled an dead old gnarly looking oak was literally covered in poison ivy and I got their attention and said you guys had better stop this instant or be very very sorry. To make matter worse they were both wearing t-shirts they had had cut the sleeves out of exposing about half of the sides of their torso. My friend was not an outdoor guy as neither was his BIL but both claimed I was wrong and the vine all over the tree was not PI, I pointed out that regardless who's right the fact the vine had leaves that were in groups of three and that the center one was higher then the two on the side was the hallmark indicator of poison ivy should be enough to convince them to GTH away from it and stop cutting trough the vines with chain saws filling the air with dust from the dried vines.
The BIL essentially said if I was to much of a chicken**** and to afraid to help then he didn't need my help. So I gave a final warning to my friend and went to his house not far from there told his mom to call her daughter a RN and tell her she had better drive over and intercede or her husband was going to end up in the ER in the next few hours. Unfortunately she couldn't reach her daughter at work and by the time she got there they were done cutting up the tree.
Needless to say they both ended up at the ER and even got admitted their rashes were so severe. I saw my friend the next day he came home and I do not exaggerate one bit saying he looked like he had leprosy his rash was so awful.