We sailed on HAL last year on the Koningsdam and went to Glacier Bay. This was such a worthwhile day, the scenery is AMAZING, and HAL brings on park rangers to narrate through the Bay and to give other lectures throughout the day. Princess does this too. The K'Dam is one of HAL's newer ships and it's about the size of the Magic/Wonder. We really liked it.
I'm not sure embarkation is worse from Seattle vs Vancouver but tbh it's been a while since we sailed out of Seattle. We are doing the Brilliance out of Vancouver this year though and I will say I sort of wish we had just gone back to HAL. No Glacier Bay, no covered pool (though I think they will have family swim time in the Solarium). Oh well!