When we look for compelling reasons to migrate to North America in 1000-1300 AD we forget people are usually emigrating away from someplace they can't stay, can't bear to stay, have lost nearly all hope in, or are too crowded to survive. They rarely know much about where they're emigrating to, and often that's mostly wrong. A century ago the main railroad here had salesmen actively soliciting settlers throughout Northern Europe, especially Scandinavia and their surviving brochures grossly exaggerate the climate and soils but were true about hundreds of acres of virgin farmland free and how they'd facilitate getting there. Populated several thousand miles of hostile Indian country during the Indian Wars there (Custer worked for that railroad too) in just several decades and a much longer journey by sailing ship (my greatgrandparents came from Sweden that way), rail, and wagons than we're talking about here (look from Minneapolis, Minnesota to Seattle, Washington...that's the expanse thus populated I'm talking about.)
The Vikings are traders (along with herdsmen, farmers, fishermen, miners, loggers, metalworkers) and would recognize the new sources of high value trade goods from their own experience (walrus and narwhale ivory, ermine/otter/mink/fox/marten/beaver/bear furs, deer/elk/woods bison/moose hides, oak and walnut hardwoods, all of the metallic ores including gold (lots of small placer gold rushes now forgotten), coal, whales/ambegris/whale oil, the great cod fisheries there (with probably Basque fishmermen already working it, when Mark Kurlansky did the math, preColumbian Europe was eating more cod than the known fisheries could produce-only the Grand Banks' cod fishery could fill that size of calorie gap.) The tribes represent an enormous new customer base for European goods/skills even more so than they would 600 years later (far more Indians alive, less of a technology gap between what's being traded, and more of a monopoly than usual.)
Classic trade goods that were already available or makeable by the Vikings would be iron/steel cookware, weapons, hand tools, mirrors, wool/linen/canvas cloth, indigo dye, beer/mead/ale/wine/whiskey, cheese, horses, cattle, cowhide leather, parchment, ink, wagons/wheels/harness, etc.. which'd stimulate North American Norse manufacturing/exploration/trade routes/trading posts/mining/textiles etc. just as it did in the 1600's-1800's OTL while also encouraging continuing and expanding trade with Europe as a market and supplier. Most of the Age of Exploration is about finding new markets for existing goods or new goods for familiar markets...spices, metals, saltpeter, teak, mahogany, coconuts, bananas, tobacco, coffee, cacao, cocaine, opium, sugar cane and rum, cod, amber, steel, etc. and was before that, getting to rob lesser-armed locals was just a mark of bad trading practices (and Leif Ericcsson's first settlers apparently making that mistake with the local Skraelings is an error made hundreds of times in the settling of the Americas (or developing Asia and African trade, stupid but survivable.)
The key element in the fur trade was making one's own alcohol and trading that to a network of Indian traders who brought in the most useful hides for leatherworking (deer, elk, bison) more than the high-value decorative furs traded for beads and blankets that we think of, so the Vikings would be well positioned to do that trading and tanning 700-800 years ahead of OTL.