RV parks make these rules for a reason, not because they hate certain breeds. Obviously some have a track record because of the dog or the owner. Funny how this sounds a lot like the gun issue, it's not the gun it's the owner.
According to the Center for Disease Control 4.5 million dog bites occur in the USA each year, 900,000 become infected. That means 1 out of 72 people get bit each year on average!!