"I guess maybe we did need a guide," the little girl said.
"I need a guide, and you were born in the area."
In order to explore them you will need a local guide.
I've been here almost two years, and I myself needed a guide for the first ten months or so.
To continue from the fall to the ruins (a further 2km or so) you do need a guide.
However, he needed a guide to help him get around the city.
With all the changes in local government you need a reliable guide.
You need a guide and a guard, one at least.
If I should be delayed for any reason, he will appear when you need a guide.
We shall need a guide to go around with us.