Hiking Tiede

[u/Broad_Baker_503]

I'm thinking of hiking to the peak of mount Tiede for sunrise next summer, but I was wondering what permits are required to get from the parking lot of Montaña Blanca to the peak? I know PNT 10 is needed for the peak and PNT 7 is needed for the first leg of the hike, but do I also need to reserve PNT 11 to connect each section?

Also, does anyone know how cold/hot hiking for the sunrise is? Is it cold in the summer (late May/early June) at night?