Minnesota's decriminalized, under 50 grams, and without evidence of intent to sell. If you weren't in a vehicle, and it's your first offense, you should have only gotten a ticket, fine, and confiscation. They're cracking down on weed, though. Because it's a big agenda item next year. Groups are pushing for both medical or legal (ala CO.)) As Balzac said, that guilty plea, fine, and drug class is a good idea.
Or, you could get a lawyer, and fight the unlawful search. Although, your being there (because it's after park close) gives them enough cause to frisk. You should move, you'll be happier somewhere else.
