Just floated Pumphouse to Rancho yesterday and there's nothing a 5 year old should keep you from. Yarmony is gravy; go left, eye of the needle doesn't exist at this flow 'cept for one rock you 'gotta go left of. Float it. It's basically a sleeper at this level. I guide it commercially often and have never heard of 'pinball'.
Pinball is far below Statebridge. You could portage but really no need to, it would be a good hike. I would portage rodeo though, which is easy to do if you are actually going down that far as it is before pinball.