I remember one afternoon....a buddy and I went hunting shroom's in his station wagon. We only had a few bags.....so when we got into the mushrooms we would fill our bag and empty them into the back of his wagon. The whole back end was filled with big grey mushrooms (mostly). Likely the equivalent of about 10 5 gallon pails....before we quit. We found some rather tall grass with lots of dead elm trees near Swan Lake, Nicollet County. Hands and knees.....could not go inches without picking a dozen or so....but you had to feel for them in that deep grass. It was really good back in those times. (early 80's??). We should have sold some.
My father-in-law and his freinds had about 50 window screens drying mushrooms at a time. Loaded up, and gave away lots to freinds. They traveled all over southern MN in the hay days of 'shrooms. It was really good along the Minnesota river where I lived.....but lots of good places. It was a few years before things started drying up. Thought those times would never end. Alas....I have not picked a mushroom in years.