Most fish will be very active with early ice. Some of the best walleye fishing I have is when the ice is 3-5″ thick. I know a handful of lakes within an hour of me that are no deeper than 10′ and have excellent walleye bites. I try to target shallow lakes until the ice thickens, then it’s game on! I tend to get out on the lakes earlier than most dare.
I know this is a broken record but first ice is the second most dangerous time of the season, late ice being #1. Just because there is 2″ of ice, doesn’t mean it’s good ice. Always fish with a buddy, wear a lifevest and ice picks. When I was younger, my dad always taught me to tie a rope to my waist and drag it behind me if fishing really early ice…it’s a good tip…Everyone reacts to the cold water differently, some aren’t phased and some lock up. Always, always, always be prepared for the worst and hope for the best. A life isn’t worth losing over a fish.