The use of bugs is very interesting. As for roe sacs, could using different colours like a green for example, be effective?
Sure. I'm no expert, but it seems to me that steelhead are likely to engulf something they haven't seen before. This could mean the first lure/bait they see in the morning, or maybe a jensen egg after a previous angler has worked through with a pink worm, or in your case, perhaps a green roe bag. My best steelhead last year was on a BC orange gooeybob and chartreuse wool combo after a few anglers had worked the pool with pink worms and another colour of wool.
I haven't fished much roe for steelhead, but i fish bags a lot. I feel that the more water you fish, the more likely you are to connect, so I prefer fishing artificials or roe bags so I don't waste time re-baiting. That said, I've cured up some really tough roe this year for steelhead, see how that goes.