I probably overstated my opposition to open water hunting in MN . . . I guess we are down to "only" 60k duck hunters now (120k 10 years ago) but for those who haven't lived or hunted in MN, it's really difficult to grasp the "enthusiasm" with which MN'ans pursue their recreation - Despite having only half the hunters of 10 years ago, anytime you find ducks, you also find hunters. Maybe open water would be fine on a few of the bigger lakes - Winni, Leech, Mille Lacs, etc.
In my vast experience, hunters as a group are not respectful of other hunters - from South Dakota to the UP - it's the same ol crapola. The reason it works in other areas is they don't have the number or "enthusiasm" that MN (and probably WI) hunters exhibit. (bare in mind here, I'm not exactly using "enthusiasm" in a positive way considering the way people exhibit it.)
In MN, people will always go where the action is . . . if it's in the marsh, they go there. If it's open water, they'll be there. The ducks get zero rest in this state unless it's mandated by law - seasons, shooting hours, refuges, and open water is about it. There simply aren't enough ducks in this state to go around.
As for number of people in a layout "crew" My entire layout career, short as it has been, has been hunting solo out of a sneakbox. I'm pretty sure I'm not the only one smart enough to operate that way.