According to Yoma 75,
The Gemara continues to discuss the manna: It is written: “And when the dew fell upon the camp in the night, the manna fell upon it” (Numbers 11:9). And it is written: “And the people shall go out and gather a day’s portion every day” (Exodus 16:4). And it is written: “The people went about and gathered it” (Numbers 11:8). How can these texts be reconciled? For the righteous, the manna fell at the opening of their homes. They expended no effort at all. The average people went out of the camp and gathered what fell there. The wicked had to go about farther to gather.
The Shteinzaltz explanation on this is
בינונים יצאו מחוץ למחנה ולקטו מה שהיה מכונס להם שם. רשעים שטו היו צריכים להלך הרבה ולקטו
The Beinonim had to walk outside the camp...the resha'im went out, they had to walk a lot and collect (my loose translation)
I don't know how large the machane was so I don't know how much of an imposition this distance was, and I'm wondering how far the "harbeh" was that resha'im would have had to walk to start collecting (I'm assuming, more than 2000 amot beyond the camp), but why couldn't they just start collecting as they walked past the mahn that fell "for" others. Did they try and it disappeared?
Did a rasha know he was a rasha? He had just recently been redeemed but I thought that resha'im would not have been taken out. How were there suddenly resha'im? Was there some public judging process or was this how each person found out his status?