Have a great trip!
We have flown on DH's flights several times now- infact we just made a trip from CLT to BUF.
When traveling with the pilot we do what the pilot does. If the pilot is riding in a hotel shuttle, so do we. If the pilot is eating "free" breakfast, so do we. We have never had a problem.
The only suggestion that I would offer is not to broadcast who daddy is. All four of my kiddos are obviously excited when they hear the Captain's voice on the pa, as it sounds like Dad's
but they are mindful not to announce it for safety reasons. Of course the flight attendents know who we are, but we really try hard to keep this information quiet.
Good luck and again, Have fun!