My spider holes wouldn't be for living. They'd be more for a situation where I needed to bug out of my bug out location. I could take off into woods, hop in a spider hole and come back out at dark or when it was safe.
The guy who used them on Doomsday Preppers did just that. He figured if he needed to bug out because he was being over run or something, he'd just get to a spider hole and come back at night to reclaim his BOL.
They wouldn't be stocked for any kind of long term living, but I'd leave an ammo can or something similar with a bit of food and water. And maybe a weapon. (mossberg 500 JIC package?)