Alright, so it took me a bit to respond with mod list. Sorry, been a REALLY busy week.
So I won't list all my mods as I do have some inappropriate ones, but I'll list the ones that can get you a nudist result.
BBLuxurySuite: This one's a bath house. No children. I only allow women to come here, with a guy that's my guard, but you can invite both. You can also have them live there as well. I also advise adding BBLuxurySuiteClassier to this one.
Schlongs of Skyrim: Yah, this one is mostly for the perv, but they do have a "flaccid" state as well, which my guys are in.
RCOTS: Rcots is for children. You have to tweak this mod with a "dirt skin" patch for children to make them naked.
Summer Wear: I added a village to the map and told everyone just to not wear anything through these options. They don't go around acting weird if there is nudity, so it's about as close as you'll get.
BetterChildrenPlusBreasts: This one will let you essentially create teenagers...since apparently the people of Skyrim are only adults and children. Will also let you modify upper female torso.
KhajitChildren: Added this, cause yah, I'm a furry, but it's boring just seeing human children wandering around. Get's pretty fun with seeing them too.
HearthfireMultiKid_LastName: YES for this. So, you get yourself a wife...you add a mansion or private area in the game, you adopt a few children and bam! Have your own nudist family living at your place full time. I have 4 kids right now and a beautiful wife, lol. It's also a Lesbian relationship, because I don't really play guys all that much in games if I can pick the gender.
Advise TKMN_MoreAdoptableChildren with this one.
Good luck and have fun!