I would be more concerned about the digging and stuff. They will find ways to amuse themselves. I can't leave mine outside on their own even now, they can have tons if toys but still would rather dig a hole.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD