Unlike others here, I haven't any recent experiences worth telling. But I have time on my hands, probably more than I will have when I retire, hopefully a week from tomorrow.
A few people here have made posts about their own private, possibly secret places for outdoor nudity. I have a few myself that I don't mind sharing. They aren't close by.
One place is near my hometown in southern West Virginia. There is a bottomland along the New River in Summers County, West Virginia, called Crump's Bottom. Upriver from there is a stretch of old road that runs alongside the river, all of this being within the Bluestone Wildlife Management Area. The part from the upriver, or southern end, of the WMA to Crumps Bottom is maybe ten miles, maybe more. It is gates and you can't take a vehicle inside from either end, although you can take a motorcycle or go on horseback. It is sufficiently private and difficult enough for nude hiking or walking. People can go in and fish but they don't go in very far. Hunting is allowed in season but that isn't when you'd want to be outside nude anyway. I did a long, all-day hike there several years ago and would love to repeat the trip. It's difficult to get to and probably not well known except to local people, which may or may not include me anymore. I used to go camping in that area at the other end of the bottom, well before it became a WMA, and also on the other side of the river. Someone who read my report of that trip on another website also visited the area. It is a place where I'd like to do my hike without a net.
Another place, equally remote, difficult to get to and probably relatively unknown is near Morgantown, where I went to school. The specific area is Cheat Gorge, better known as a place for white water canoeing. It also has sufficient remoteness to be fairly sure of enough privacy to do some nude hiking. I made many trips to that area when I was in school. What the area is like now, however, may have changed a lot in the time since my last visit. That was over 35 years ago when I made a trip there with my wife, the only time I've done nude hiking with another person.
There are closer places I go these days. One in near Front Royal, Virginia, in the northern part of George Washington National Forest. It is near Elizabeth Furnace, an old iron furnace. There is a large parking lot on the right just before you get to Elizabeth Furnace, which is on the left. From there, you can take one of two trails to the top of the ridge. It is less visited on weekdays all year long. There is some kind of electronic facility at the top of the ridge that makes a good destination. It also happens to be the northern end of the Massanutten Trail. But the size of the parking log suggest that sometimes there may be a lot of people up there, except there never has been when I've been there on a weekday. But I once did a nude hike there, well over ten miles, nude the entire way. When I was back in my car, making some notes, a school bus full of what looked like grade school kids pulled in and a bunch of kids, half of them wearing swimsuits, and ran up the trail that I had just returned from. So you never know.
I have hiked nude a lot in Shenandoah National Park, which is sort of risky. There is one trail in particular that is sufficiently less-visited to allow a worry-free nude hike. The only problem is, it is steep, even though it is an old road. The hike back up to the trailhead and the parking lot is exhausting. It is a real hike, not just a walk in the woods.