Hi,
i think they were not so big like Elvis, Carl Perkins but they recorded a lot of song, did a bunch of TV Shows and i think they still again on tour.
I have the 2 CD Album from Bear records of the Collins Kids, great Album.
One of my favorites "Just because"
https://www.youtube.com/watch?v=EZvQOzng9xgand for sure their Hit "Hop, skip and jump"
https://www.youtube.com/watch?v=QoEI1eeCBZoAnd hey, she was a really nice and sweet girl, arnt´t she.
I guess Rickabilly knows more than me and could tell us a lot intersting things about the Kids.
I like them...but their influence to Brian? I don´t know. They did and still do Rock`n Roll.