From the time our puppies are three to four months old and fully immunized we put harnesses on them and let them pull a small block of wood or anything light to drag behind. We take them around our subdivision resulting in much socialization for the puppy and for ourselves.
People are interested in the sight of a cute puppy happily dancing along in harness.
As the dog matures we graduate to a wheel barrow tire with an eyebolt and line. To keep life from becoming boring we alternate with obedience walks and little bike rides without harness. I think the more activities you do with your Mal the less destructive behavior you have. Dave and myself along with some other Malamute people run fun weight pulls and practices at the local fairground where there is a permanent chute, a cart and some weights available. As in all activities we have dealt with the good the bad and the ugly but mostly we all have fun.