When we played last Sunday, we said that moving into a new room in the house required a roll. Moving into already explored rooms do not require a roll. If there was a question about whether a movement required a roll or not, I (the facilitator) polled the group and left the decision to them.
Returning to the ship required a roll but you could move all the way through the house to return to the ship.
We also had the raccoons leave loot behind during a botched escape. Raccoona Matata had the option - drop her cherished hat or loose the ship's home appliance. She chose the appliance.