The Devils Lake Region is mostly small grain like wheat and barley, Sunflowers, Canola are around too. Corn is pretty scarce, a lot more 100 miles south though. You better be able to tell the difference between barley and wheat, as the the ducks and geese preferr barley as it is easier to digest. Bring waders for each guy-forget the boat. 1 sack of puddlers per 2 guys is enough and thensome for pothole shooting. For geese, yes they hunt them in the fields over decoys with layout blinds. Shooting the goose roost is held in high distain up there. they know if you shoot the roost-the geese will boggey, so they only shoot the fields and thus the geese will stick around. There will be local giant CA geese and maybe a few lessors around, could be a couple of snows around. Really too early for Snows though. So I would bring the field hunting trailer VS a boat or if you can throw a small boat on top of the topper rack, it might come in useful.
FYI--it is really wet up there. A full scale drought 1 year ago-now way too wet. So bring extra tow ropes-and forget 2 wheel drive trucks. Heck if it is raining evening 4 wheel drives have a dilly of a time on the township roads-much less in the fields...
Buy a ND county by county atlas--lots of section roads, etc.. up there.
And lastly, traditionally for migrant geese, North of US #2 is for Snows and south towards Hwy 94 is more for CAs. But there are now a decent amount of locally raised Giant geese to go after in much of the state. And that time of year you will be shooting mostly locally raised ducks VS migrators from CA.