None of the sites at Smokemont have hookups except for a handicap one with a 5 amp or so plug.

No power or water. Certain loops allow you to run a generator - the ones in the rear and across the creek where the bigger rigs are sited.

No. Most NP sites are dry camping, no hookups. If I remember correctly there were flush toilets and water was available. Easy access to the main road over the mountain.