I have fished the Skeena and Kitimat a number of times in late March and April. You do not need anything heavier than a Type 6, and 90% of the time I have a Type 3 tip on. Unlike winter steelheading in CA/OR/WA, there is no need to fish heavy tips. Most of the water fished is not technical and you will fish even runs and tailouts that are not deep. You generally are not targeting deep slots, heavy water, ledge rock runs etc., that we encounter in the west coast states that require us to get deeper quickly. You can use your skagit heads, but won't need Muir- density heads. I've used skagit heads (but use my longer heads), my Rage heads, and NextCast heads all in the 23-30 foot range. Many will cast heads more in the 30-35 foot range with the lighter tips, and some go even longer if they enjoy longer lines and rods. Have fun!