We just returned from a month up north. On our way up during the first week of June, we were lucky and were able to clear in at Northway. But it was luck. Another pilot had landed at Northway the day before, but messed something up on his paperwork, so they sent him back to spend the night in Beaver Creek. He then scheduled to clear into Northway at 9 a.m. the next day. That was just before we called Northway customs from Whitehorse. Because there was going to be an officer in Northway to handle the other plane from Beaver Creek, the officer in charge said that he could accommodate us at Northway provided that we could get there asap the next morning. I told him the best we could do was 11, and he said that was ok.
We had 40 knot headwinds and moderate+ turbulence trying to follow the highway from Whitehorse to Northway. We were going to miss our scheduled arrival time by more than 30 minutes, and the turbulence was murderous, so we turned north off the highway and cut the corner to Northway via Aishihik Lake and the Nisling River. The headwind turned into more of a crosswind, and the turbulence moderated after a few miles. We landed right on our arrival time in Northway.
The customs officer who met us at Northway was very helpful and relaxed. It was--by far--the best customs experience we had the whole trip--Canada and the U.S. But again, it was just luck. If that other pilot hadn't been put through the wringer the day before, we would have had to file for Anchorage with fuel at Tok--and the weather down the Glen highway that day really sucked.
After we cleared into the U.S. at Northway, we fueled and waited a couple of hours in Tok until Mentasta Pass opened up and things looked more passable down the highway. Even then, we hit some weather that almost stopped us at Gulkana. I would really have been sweating if we'd had to hit an arrival time for inspection in Anchorage. That may not seem like a big deal, but we had difficulty amending our EAPIS en route while returning to the U.S. from Canada, and the flight from Tok down to Anchorage is long enough that we could have gotten stuck part way at someplace with out cell or internet reception (although I just heard this morning that the Army ran fiberoptic cable the entire length of the Glen Highway some years ago--so maybe there's web access at landing spots along the way).
The customs officer who met us at Northway was extremely sympathetic. He confirmed the staffing shortage problem, and told us they know how difficult it can be for light aircraft to manage the weather and paperwork to clear into Anchorage or Fairbanks. And if you can't make it all the way, do what you have to do to stay safe and sort it out on the ground.
The coastal route was out of the question when we came through due to weather. Going forward, I will try for Northway (hoping to be lucky again) but plan on Anchorage or Fairbanks, depending on which one looks more doable weatherwise. None of this helps Ted on this trip, unfortunately. I really appreciate in FlytoAK web site. It was invaluable both as a resource and a checklist for getting us through our crossings.
Best of luck.