Quote"How maneuverable are TT's"
Depends if you know the secret of backing a trailer.
Some truck drivers can back the trailer down your 90' driveway at 20 MPH and not be bothered at all. It sounds like you have enough room, or perhaps it is time to cut down a tree or two. They make stump grinders that will grind away anything that was left. Stump grinders look like a 36" diameter tablesaw blade, and it moves back and forth across the stump until it is gone.
Fred.
PS: The secret is to keep your hand at the bottom of the steering wheel, and then move your hand in the direction that you want the back of the trailer to go. I used it to move my brother's 27' cargo trailer behind my 30' motorhome while in a very crowded pit area, at night, in the dark. The center isle was about 12' wide, and the trailer and my RV 8.5' wide. The people at my work back into docks all the time, they drive trucks for a living.
Fred.