My sister and I only toured during the day so cannot respond to the above question concerning evening hours.

Sorry, did the standard tour, didn't realise there was a VIP tour. I would have done it given the chance!

You can buy the ticket when you get there

The distances from station to station of the tour are relatively short. However, there are areas where the slopes are quite steep - specially going to the highest point of the citadel (where the views are fantastic) - which may pose a challenge.

The Citadel is a working military base and you have to pay for the tour to see it. You can walk around outside but to get inside you need to purchase a ticket. We found it well worth it. Hope this helps.

Yes only in summer

As others indicated, you can only walk the inside of the Citadelle with a tour, but you can walk the exterior which has lots of views and fortifications.

The duration is 30-35 minutes- the cost is about $ 35 per family

Hello, you need a reservation if you are a group of 15 or more, or if you want do to a VIP tour. We recommend booking if you wish to do a Visit at Nightfall (available on Friday and Saturday from June 21 to October 26). Otherwise, you can buy your tickets on the day of your visit at the boutique of the Musée Royal 22e Régiment. From May to October, we offer guided tours from 9:00am to 5:00pm, usually at least every hour on the hour. From June24, you can also attend the Changing f the Guard, at 10:00am.

I would double check and call about a night tour, I don't believe there is one.