Local RSN included in sports package?

We only subscribe the family package as my wife only watches broadcast shows and the kids watch nickelodeon and I don't watch much of anything. I'm wondering if I add the sports pack if I'll get the local RSN's with the family package or if I have to upgrade to one that bundles the comcast sports networks with it? The customer service rep said he was "pretty sure" I would get the channels but I would like a definitive answer. Also can you cancel/add the package just during basketball season? I don't really follow the local baseball teams and don't think there would be any compelling programs outside of the NBA as NFL/College games are all on the broadcast networks.