Outside IKEA, there needs to be an area designated for family members to camp for the night with purchases that didn't fit in the car this time around. Now the question is: who do you leave behind to guard your stuff?
Mokalus of Borg
PS - It would depend on who you have with you and what they're guarding.
PPS - You might find they've banded together and built a fort with other stranded people when you return.