I rode Yankee this morning (well part of it). Was my first actual ride here and I was solo but the place was good.
This time in my visit, I actually found the mtb trail head/parking area so the start was much better than my first visit. Trail conditions were sandy (as others have expressed) but still somewhat damp due to the torrential rain we had on Monday. For the most part, I didn't sink in the various sand patches unless they were in direct sun exposure. (I think they still had enough moisture to keep me on top)
I did find a couple trees across the trail and unfortunately that is where my ride got cut short. I carried across them but decided to try to clear them. The first was smaller and I was able to drag it off. The second was probably 8" and I tried to cut it with my rope saw. The outer edge of the tree was dead and I cut almost 1/2 way through. Saw kept sticking so I tried jumping on it, pushing and eventually pulling on it. That is where my ride got cut short as I threw my back out. Anywho, the tree won won the battle but is at least rideable now. I did manage to get back on my bike and from there, took the first shortcut and returned to the trailhead.
What I did see down there, was beautiful. The ride was good (I was sweating and heart beating hard so I got some of the exercise that I came for). It really is beautiful country down there despite the hungry deer flies.