How long is hike to unrestored section of wall and watchtower?

We're interested in the charm of the unrestored section of the Great Wall but cannot do a long hike. Simatai looked like a perfect selection but it is now closed for restoration?

How long is the hike to unrestored sections - and an unrestored watch tower at Jinshanling? Do cable cars go to the unrestored sections?

Lastly, how many snakes are we likely to meet along the way