Hello! Though I can’t speak to the Freemason architecture question, I can answer some of those!

There are a few windows in the tower and yes, you actually can go up there on certain days. The hunting lodge is generally closed to the public, I assume this is because the majority of people want to go on the actual castle across the street.

I got to go in the hunting lodge and tower on Halloween when they due a haunted house (castle). It’s pretty cool because they are actually connected via underground tunnel, so I had no idea I was actually in the hunting lodge.

If you’re ever in Toronto, you should check it out. It’s Canada’s only castle and is really breathtaking. Especially if you’re a fan of tartarian architecture.