No ! Well worth while going.

No just purchase your ticket and go.

No, there is a ticket booth outside, was not busy when I went but they do cater to bus trips; and students go there for graduation photos. There maybe a line up to get in.

Nope

No, you don’t, like many attractions in Vietnam, a lovely country

Easy to purchase tickets at the main gate not the side gate on the south side

No, you can purchase tickets once you get there. Not sure of the price as we had a tour guide which covered it.

Nope!

Went about midday and it wasn't too busy.

No, you don't have to.