Is it legal to drink alcohol when riding in an RV?

Question: Is it legal for a person to drink alcohol when riding in an RV? I know someone who uses his RV to haul people around for weddings and celebrations and those people are drinking in the vehicle.

By: Trooper Andy Schmidt of the Minnesota State Patrol, Alexandria Echo Press

The Official Newspaper of Douglas County!

Is it legal to drink alcohol when riding in an RV?