It's rad that you duo-d Pine Creek with Holden. Seemed like a good experience for both of you. Duo'ing also seems like a good way to get a taste of harder stuff.
But you didn't answer your own question. My answer is the same for anyone thinking about class V: You're only prepared if you have the skills to (a) navigate the rapid in good form and (b) competently assist your buddies in the event of a mishap.
I've seen plenty of young kids that have (a) covered; (b) not so much. That's probably not a huge deal on something roadside, but it's a serious issue on anything more remote.
"A river is more than an amenity, it is a treasure."
-Oliver Wendell Holmes writing for the majority in New Jersey v. New York