Favorite: Nevada Sun Rancho. No longer around apparently, but when in Las Vegas for a week on business, wife and I stayed at NSR for the week. It was quite a drive from the LV convention center each day, but well worth it. We ended up staying two additional days and played hookey from work! The lady who owned and ran it was the best, and we felt so "at home" there. The common room with the giant TV and kitchen was superb.
Runner up: We had been members of Laguna Del Sol since 1997 but recently let our membership drop because we don't visit the club enough to make it financially worthwhile anymore.
Now we have our own miniature nudist resort at our home, and it's great. Once the pool is done (we cash-roll everything because we live debt and mortgage-free), it might become our favorite nudist resort ever.