I plan to NOBO Thru-hike the AT in mid Mar 2018. At the risk of being classified as cheap...thinking along the lines of every $ savings count.
Given your AT trail experiences during the Mar-Apr period and the weather being on avg. mild / cold and bugs are not likely to be out during this period.
Would you still go ahead with the Permethrin gear & clothing treatment prior to the start of the hike? Or Would you skip this 1st application until the last part of April / early May?
On another related topic: Applying the Permethrin while on the AT. Did you applied it while camping? or On a zero day in town?