My FH and I currently live about an hour away from my family and 2-3 hours away from his. We haven't chosen a venue yet, as we aren't sure if its going to be in my home town. My family will come visit us about very two weeks or so, and we'll go visit them about every three weeks. His family though has visited us twice since we started living together a year ago and that was because we babysat his younger brothers for a few hours. He complains a lot about the fact that they don't come visit us now as it is.
My home town is a highly sought after tourist destination, so we will need to book blocks of rooms as soon as possible. BUT the issue is that I'm worried that since his family already doesn't come visit us, that they won't want to make the trip down to my home town about a 3-4 hour drive for them. His mom might try to coax them down by trying to pay for the rooms for them, which I wouldn't want her to do. She has six kids still living at home with her and a tight budget already.
I know he'll be devastated if only a small amount of his family shows, compared to my side. (Which is about 100 family members on its own)