There are many species of Carpenter ants and all are in the Genus of Camponotus. Northern Carpenter ants differ from the Southern Carpenter Ants we have in Florida in both appearance and Habits. However Nik's post about Carpenter Ants is typical of those Carpenter Ants in the USA even if they are different Species.
BTW Fipronil is on the EPA hit list.
it is one thing to do a off label applications. It is total stupidity to post it on the world wide web and expect people to approve.
You can lead a Donkey to water but you can't make the Jackass Drink