Means those kids lived with those famillies.. Billet is another way of saying.. Basically... While in town they take care of them and house them and treat them like they are their own.
Fun fact.. When i was younger i was offered a chance to go play out of province. I turned it down cuz St Boniface Saints wanted me also and i could stay here but if i did go to Sask, where a team wanted me to come... Id have lived with another familly aka a billet family. Glad i chose to stay here cuz playing for the Saints was fun AF.
I had a friend who tried out for a team in Sask tho.. He didnt make it but... I almost wanna say that team was indeed Humboldt