On the average , when does foot traffic (4-5") for ice fishing start up n the northern part of N Dakota? Lakes like Rock Lake,Rush Lake, Lake Metigoshe and Icelandic state park? I am just trying to set my vacation time n for work:) I am hope it's early Nov. Foot traffic for me is 4-5". Those days of me getting on 2-3" is a 100lbs ago and also back in the 80's.