Throw another name in the hat, Lodholz North Star Acres near Tomahawk. Only ordered spruce and some hardwoods from them but decent especially if you want a little bigger stock at times as they have several sizes typically and I did see tamarack in their recent flyer.
I second the pull them soon after frost out if you have some little ones in other areas. Spruce seem to pull with the roots pretty well with that approach, no shovel needed if you can dibble bar them back in. Would think could do that with tamarack too.