After the requisite 15 minutes of searching here I'm still not sure what to expect.

I'm a GM on a paid ticket. Wife and daughter are on separately booked but identical flights to Hawaii.

If I call to get them linked can I expect to get up to two bags each free?

The answers I found here seem to be generally considered yes if I check everything at the counter with an agent. Any recent experience? I'd like to save $100-$150. I'm also traveling with an unticketed infant and I'm not sure how much my wife will make me lug around.