What kind of hunting are you wanting to do? Hunt big water divers, mix bag in a pothole or field hunt geese and mallards? The glory days of ND are in the past as the huge influx of non resident hunters have helped lock up land and seen more posted signs every year. This year electronic posting is statewide after a three county pilot program done last year. So just because its not posted doesnt mean you can hunt it. You have to verify with the app. That being said, there is still great hunting. You need to familiarize yourself with the public and private land options. When Minnesota schools go on fall break, you will have a blue wave of Minnesotans flood hwy 2 and 94. You have to hunt the current conditions, every year is different and the birds use different parts of the state differently every year. Last year, I was hunting 5 degree weather, and the year before we had 2 ft of snow and this year well be wearing shorts. Don't be afraid to knock on a farmers door but be respectful. Some will ask for a set dollar amount per gun others will show you were the birds are feeding and some will tell you no. It goes without saying, but be courteous and respectful to the farmers. Dont rut up fields and 2 track roads, pick up your trash and hulls and stop by at the end of your hunt to say thanks. You d be surprised how easily they remember who you are if you ever go back.
There is a set of locals that have a disdain for anyone who hunts the water/roost. Most of the time it will be the local goose hunters but its worth noting as it maybe tempting to set up where 10k ducks are roosting.
As with any hunting, scouting is key. When its light out, either hunt or be scouting. Not uncommon to put 3-5k miles on the truck for a week of hunting.
Good luck