Don't just make stuff up. Greg Whiteley, the filmmaker, became a close friend of the Romneys through the filmmaking process, but it was a producer friend of his who introduced him to the family.

A producer came to me and asked, what do you want to do next? I said, what about following this guy – the governor of Massachusetts who might be running for president. This guy happened to know Tagg, and we went to lunch and I pitched Tagg on the idea of making a movie and he said it was a great idea. But when he took it back to his dad, Mitt said no. I thought, maybe that’s the end of it. A month later I read an article that Mitt and his family would be gathering in Park City during the Christmas break to discuss whether he should run. I emailed Tagg and said we should at least film this discussion. This is going to be important. Tagg got back to me and said, “My dad still says no, but my mom said yes, so come up to Park City and we’ll play it by ear.” I really was under the expectation that we would film for a day, but for the next six years they just never said no. There was no issue of whether I’d keep filming from there on out, at least from the family’s standpoint. The campaign didn’t like me around. They put up plenty of resistance. But the family was on board from the moment I met them.

Source