I used Simms G3 waders with their Flyweight Vibram wading boot for my moose hunt on the Alaskan Peninsula last year. Was very happy with that choice. Not sure if conditions in Newfoundland are similar enough that these would be a good choice for you. With light enough base layers I thought hiking/stalking wasn't too bad. Synthetic base layers in lightweight and heavy weight to mix and match along with a Kuiu Peleton 240 full zip hoody and a puffy for warmth while sitting/spotting. Good rain coat for over everything for extra warmth/keep dry/block wind. I used HH Impertech.

Do or do not, there is no try.