[I] I say we b/c this is the 1st time I've seen a pig skinned,/I]
This pig was not skinned. Hide was left intact, and you don't want to remove the skin to roast a pig. You would scorch and ruin a lot of meat if you skinned the hog.
Yes you could just get up early and cook the pig.
If you wanted to use the aluminum foil tent, I bet you could cook a 100 pound pig in 10 hours.
But, doing that you couldn't see the pig.
Half the fun is seeing the pig on that oak spit, it really gets the attention of the party goers.