Of course it would not work. The Soviet Union had scenarios crossing the Bering Strait and invading the United States.is scenario of an extended war involving both conventional and nuclear forces follows an overall Soviet strategy with the following objectives: destroy the most threatening enemy forces, destroy the main links and nodes in the national command and control authority, do not destroy large areas or create nuclear deserts, use minimum weapons yield to prevent target overkill, prepare to strike the most important targets twice, and do not attack and destroy all targets (because it is not possible or desirable).
This nuclear exchange is followed by an invasion of conventional forces involving sea and air battles, tanks, paratroopers and infantry. Airborne units strike across the Bering Sea and invade Alaska. With Nome, Prudhoe Bay, Fairbanks and Anchorage, the Soviets have secured the strategic oil reserves to support the ongoing war effort.
A combined sea, air and paratroop assault on Seattle, Tacoma, Victoria and Vancouver secures the port facilities and gains control of I-90 and I-5 North and South. The Soviets secure their beach-head in the Northwest.
Armored units begin moving east on I-90 to Ellensburg, Washington. At this point, part of the advancing force turns south on Interstate 82. The objective of this unit is to secure the chemical weapons storage at Umitila, the bridge over the Columbia River and the intersection of I-82 and I-84. Securing the intersection of Interstates 82 and 84 opens the back door to Portland. Military units move east on I-84 to flank resistance to a Soviet military push south from Seattle toward Portland and Longview down I-5.
From Ellensburg, military forces continue moving east to Vantage, securing another bridge over the Columbia River and opening the door for a push to Spokane.
Meanwhile, in other parts of the country, an invasion force from Cuba establishes a beachhead on the southern Florida coast. Communist forces pre-positioned in Mexico move across the border into Texas. Elements of the Soviet Red Banner Fleet secure New Orleans. This establishes key access to the central U.S. up the Mississippi River. The Soviets also mount a land, air and sea attack to secure the St. Lawrence Seaway.
1. Any massing of forces to invade Alaska and Washington state would have been seen.
2. Alaska and Washington state did not hold enough strategic value to warrant the committment of vast resources to capture them.
3. The Soviets would have well outstripped their lines of supply.
I'm not going to argue about what could have been, but your post does not conform to the reality of my experience as an army officer at that time.