What river(s) will you be fishing? If you're being guided, listen to him (them). There are some very skilled guides who know their rivers and their fish very well. You might be surprised to find that, unlike most of your steelhead fishing, fast moving flies are best in some circumstances, although most of the time I'll fish normal "sweeps". Also, in some places totally dead-drift dries will outfish waked ones. There are no hard and fast rules (I love to break normal traditions) but listen to your guide. You'll find some gorgeous water and good people on the Gaspé.