NC is a socially conservative state! If the pool and tub are screened from public view, you are OK. Otherwise wait until after dark!
If you have a 4X4, take the ferry to Okracoke and drive down the beach until you are out of view of other people and have fun. Dear wife and I have spent many a happy day skinny dipping on Okracoke. Just keep an eye open for other people driving by in their 4X4. Weekdays are the least traveled.