I think I can help with some of the confusion on this show:
-Steve & Steve’s family (& the writers, producers, etc) are the only people in the show who are “in on it”. Randi does not know, nor does her family, nor do any of the people they have to inetract with (wedding planner, etc). They may reveal something different later, but from what the audience is told right now, that’s the set up.
I get the feeling that the people might be let in on the secret after their role, though. Something the wedding planner said in her exit interview made me think she was let in on the premise after her part -can’t remember what is was she said though that made me think that.
-Explaining the cameras is easy. Just tell everybody “they’re from a reality-dating show”, and answer and particulars with “we can’t say under our confidentiality agreement”. Done.
-They set this up well, too. From what I can figure out, they had her sign up ‘blind’ for a reality show. She wasn’t told many of the terms of the show, just that she was going to be on a relaity show. Fox then put her up in a hotel for a few weeks and left her there (presumably allowing enough time to pass so that her family would believe she was in a longer-running reality show).
-Cameras with her family: They know she left to be on a ‘reality show’ (and probably told Randi was the winner), so to have a camera crew show up to tape her first call home, or her arrival home is not unexpected. They can just say “it’s footage for the reunion show”. Done.
-Once her family is told about the engagement, the excuse becomes “we’re filming for a spin-off of the happy couple’s marriage”. Didn’t some show (The Bachelor, maybe? -I don’t watch many reality shows) already do this?
-The editing of future episodes: Don’t forget they followed these people around for many hours, and have LOTS of footage to use. They can dig up a shocked reaction to edit next to just about anything. In the ad they’re running now, there’s the minister saying his “Does anybody object…” line, and they then show the father standing up. Watch closely, and you’ll see Randi’s father immediately turn and look down the aisle. I’m pretty sure this is the father reacting to the “Who gives this bride away?” part of the ceremony, not the “any objections” part… it’s just edited to look that way.
I’m no TV executive, but personally I think they should have had Randi hook up with Steve differently. Something about “we chose this slob for you” would have tipped me off. I would have had her pick him from a ‘random’ draw, or in a ‘dating game’ answer-questions-behind-that-wall kind of way (where Steve comes out no matter which guy she picks), or I would have let her pick from the handsome guys at the beginning, then thrown her Steve as a curve when her original choice was ‘fired’ from the show. That would have really thrown her for a loop!
But that’s just me.
Oh, and the host! WTF is that train wreck!?! I couldn’t put my finger on it, but “looks like she should be in a bad porn”, just about sums it up. My God, she’s horrible! NOT convincing as a host whatsoever!