I'm wondering if the tubs are secluded enough to go nude? If so, is it possible to get a little sun as well or is it too shaded?
Yes and Yes
Private enough... yes most of them for most people. Sun in a hot tub? Nah they're covered for inclimate weather. Go you will love it and go back again!
You will love it. Promise!
Yes, the tubs are very secluded with lattice screens and vegetation. Probably can't do sunbathing, too shaded.
From what I saw as we did not get to use them, they are enclosed tubs but not a large area, they are shaded over the top. They have a dressing room inside I think. No place to lay out and nude sunbath altho they do have several acres of land, no private areas for that. Make reservations before going. they hold a lot of events there and can be totally booked up, or at least a 2 hour wait for others to get done.