Dave -
You are correct - chrome pinks are very responsive to flies (and most everything else). Anything small and pink should do the trick; though in the past I have problems keeping off my cutthroat flies. Currently there are 10,000s in the river - mostly the upper Snohomish. The even year fish tend to spawn lower down in the system than the odd year fish; with some fish spawning down to nearly the mouth of the Pilchuck.

A 4 or 5 weight rod should be ideal. I find that in fishing fresh run pinks it helps to get the fly down some. I prefer full sinking lines rather tha weighted flies for get-down. That may limit your rod choice as type 4 to 6 sink rates tend to be the most efficient in presenting the fly. Hope you and others enjoy this new opportunity.

Tight lines
S malma