Question about the Prague Castle

I don't think the night tours take you into any buildings but just take you a tour through the area at night, it is easy to do on your own and you can go into the castle area without having to pay at anytime though golden lane is restricted till after 5.00pm.I have done so many times over the years
The whole castle complex in quite large and you need a full day to see it all , in fact you can easily spend a couple of days there.I would go for one of the major self tours and I think you can take 2 days to visit the various building depending on what tour you choose.
I last did a proper tour of the castle area a few years ago, I did the A tour but I am sure there were other things included then.
https://www.hrad.cz/en/prague-castle-for-visitors/tickets

I was there last spring, walked over the Charles bridge and all the way through town and up the steps to reach the Castle, where there's a ticket window--several ticket combinations available, depending on what you want to see. On a Tuesday afternoon in May there wasn't much of a line, things moved along quickly and I toured the castle, St Vitus cathedral and wandered the grounds, ending at the part I loved best--Zlata Ulicka (Golden Lane), a long row of tiny houses, some are shops, some are just for viewing, one belonged to Kafka's sister and he lived there for a while. Definitely worth spending 2-3 hours there at the least, more if you find other things that interest you.

We have visited the castle three times but different groups we were with. What was different from the last trip in 2015 and this past August was the security checks. Bags are checked with wands. We entered through the side entrance and the line was not too bad but the gate at the main entrance was long as was the line to get into St.Vitus. However, things moved along. Depending on interest a couple of hours or so is sufficient. I had hoped to see the Castle Orchestra and purchase a CD but unfortunately they were not there on that weekend afternoon. I think the castle is a must see for Prague.

Thank you for the great information

We visited the Castle last month. Went to the monastery, brewery and Loreta Church first, so by the time we arrived at the Castle it was about noon. The line to get get through security was 45 minutes. Ticket line after that was non-existent. I would think about arriving when the Castle opens in order to minimize security wait time.

there was no queue when I went through the castle area on a Sunday afternoon in August, just a quick check of our bags.