I have also made a healthier version, using fat free cheddar and low fat mayo. This is still good, but honestly not as good as the original.
Lastly, you can freeze the uncooked boats (on sliced bread or rolls) for up to a month. Pop in the oven frozen X 30min
This recipe was given to me years ago by a family member and has been served at many parties, even weddings, since then. It's always a hit!