Leigh I have a similar situation.
A few weeks ago FI got into an argument with his father, because for some reason his family always has to butt into our lives, when they should really just be concerned about their own. So anyway, his sister called and they argued, his brother called and they argued, the only one that didn't get involved was his mother.
So now he went from talking to his sister several times a week to not at all and he calls his brother, but I think his brother is taking his dads side, so even though he said he is going, he hasn't booked either and I think its for this reason.
I feel really bad for FI because my family is all booked and none of his family is. I want to mention it to him, but I just don't want to make him feel worse.
I think everyone is right though, we both have a lot of time. Because of the special I thought a lot more people would have booked too, but some people are booking on their own.
So we just have to remember that our wedding day is about us, and not about any of our inconsiderate friends or family.