About the tarp....

I don't think this will do anything at all. The poison Ivy (a vine
plant) will continue to travel along the ground until it finds some
sunlight and then it will pop out. It won't die.

I rented this house once that had loads of it. I covered an area with
an old tarp and dumped all my grass clippings on it all year, the damn
vines worked there way to the edges and popped out and kept right on
going.

I moved the next year.