G, for your first question, yes the tag must be affixed on the animal as soon as it's shot down, if the animal stays put.
Second, the guts will not spoil the meat unless it overheats, must be gutted as soon as possible
Third, the only canivores that I would worry is the wolfes, coyotes and ravens / crows
Temps are dipping into the minus..... don't have to worry about the meat being spoiled.
Jacques