You didn't lose time avoiding the poison ivy - all the routes through medium/dark green were slower. The one route through the light green to #7 was faster, but there was no poison ivy there (or what there was was easily avoided).
Went thru the lt green at 7.
I think it was on 1 (NE). On the way out I spotted an opening in the dk green and took a chance. I'd made it almost to the edge and ran into waist high ivy. Turned back and came out a safer way