I think that itinerary sounds great. We did Halloween at WDW last year, and if the fireworks are 1/2 what they were in Floriday, you'll be a-squealin'.
Hmmm. Travelling with friends to Disney parks. It can be somewhat of a sticky wicket. Heck, it's a sticky wicket with me and my partner, as he's not into Disney AT ALL. Once we were walking through Liberty Square after dark, not too many people around, and I was just really getting into being there and appreciating the detail, etc. I said something like "isn't this great?" And he snorted and said "Yeah, for being at a damn Disney park, it's WONDERFUL!" (insert sarcastic tone there). I tell you, I had to walk away before I smashed his skull into the Liberty Tree. LOL
So if they're into it, you're going to have a great time. If not, just take a deep breath, and make it a game to observe what tickles their pickle about the place. No matter how much one resists, there's always one thing at a Disney park that illicits that smile.
Sidebar: I was a follower of your blog, Zeitzeuge, for years. Miss it.