Wait for 2nd weekend, 1st is always a zoo. LOTS of guys from MN, SD come for Non Res opener.
Also I would temper expectations on availability of "good" spots, especially if field hunting. Most people here now post all their stuff and lease it or only let certain people on. In ND you can hunt stuff that isn't posted though. But be warned, the last few years the new sleep in the field or show up 5 hours before sunrise crowd is very present in ND. You will have stiff competition.
If you want to have an easier time finding public access, stick by all the water. You can always hunt a slough if you can't find a field.