In general, I would not be in favor of including Canadian territory into any of the new provinces.

Having said that, it might be worth considering trading SE Alaska, for say, Vancouver Island, to reduce the isolation of the former.

IMO, Idaho would be a better fit with Washington and Oregon, than California, which could unite with just Nevada and still be the most populous new province.

How about the "four corners" states uniting to form a new province?

Alaska and Hawaii would form a good union since they both still have significant native populations.

HOG