Porter-guides used to dealing with independent trekkers normally prefer to carry your backpack on their shoulders. They will likely carry a daypack for their own gear, packed on top of your pack or worn on their front.

Hiking Climbing and Trekking in Nepal
Porter-guides used to dealing with independent trekkers normally prefer to carry your backpack on their shoulders. They will likely carry a daypack for their own gear, packed on top of your pack or worn on their front.