My question involves criminal law for the state of: Michigan
I was at a party a few days ago in Houghton, Michigan for winter carnival. My friend and I decided to walk there along the snowmobile trails since we don't drink and drive. Upon leaving the party at 1:30 am, we proceeded to walk back home. As we we're walking a long the trail, a state patrol pulled up and stopped us and started questioning us, and we were given MIP's because we had been at a party and had backpacks full of some left over beers, and we are both 20 years old.
My question is, how can they stop us while walking without probable cause and then get MIP's for it? No breathalyzer was given. Also, many people walk the same trail to get home from the bars, while waiting for the cops to write up the paperwork, at least 10 different people passed by on the same trail. Is there anyway I can get out of this, or what should I do?

