Howdy,Papajack.
We usually get steelhead fillets around 8 0z.
They are about 1 in. thick and 4 in. across.
I don't mind cutting them to 1x2x4 inch.
This gives me good flavor,even cooking,and good snack size.
I'm cooking them skin side down and not turning them anyway.
Those rainbows are probably better as a warm entree and several of the folks will give you good approaches.
I'd like to cornmeal 'em ,fry 'em in some oil and bacon grease mix,throw in some hushpuppies ,tossed salad and a sharp white wine.
Hope this helps some.