Where is a good place to get the shipping heat packs? And which ones? I'm also crossing my fingers that the power doesn't go out.

If putting the snake in a tub in a pillow case, should there be holes drilled in the sides of the tub? I would imagine holes on the top would get smothered and not allow oxygen?

I'm more worried about my fish, honestly. My ball python is easier to improvise for with the above suggestions.