It shouldn’t be an issue. They can let you in before they go to work or after. I have had friends who were able to let people in while at work and come back but that’s a management call -especially if they are prepping for you to come they can move or switch their schedule if need be. They also don’t have to be with you (after letting you in)as long as you behave yourself. They had issues with people abusing the system and misbehaving with cm not there.