Unless things change, your most predictable stop will be the border crossing where you will be turned around.
The border will be closed most likely due to Covid.
If for some reason that changes (highly unlikely) look at stops like:
San Francisco to Trinidad (Redwood National Park)
Trinidad to Brookings, oregon seeing more of the redwoods and Klamath River
Brookings Oregon to Cannon City (on Oregon Coast)
Cannon City To Seattle
Seattle to vancouver - if border open
Are you Canadian citizens? If not, it's unlikely you will be allowed to enter Canada. Right now, the border is closed until May 21st, but that is expected to be renewed each month until at least the fall, when it is expected that the majority of Canadians will be vaccinated.
If you are Canadians, the 14-day quarantine period will likely still be in effect. You would have to have your quarantine plan prepared, to be evaluated by the CBSA border guard.
You can monitor the situation at this page on the official Government of Canada website: https://www.canada.ca/en/immigration-refugees-citizenship/services/coronavirus-covid19/travel-restrictions-exemptions.html
Canada has implemented restrictions about entering the country. Here is a link with official information about driving to Canada:
In the past week in British Columbia: Hospitalizations due to COVID rose 18 per cent and ICU beds filled rose 27 per cent.
In Canada: Hospitalizations rose 16 per cent and ICU beds filled rose 14 per cent.
Canada does not seem to be prepared yet to open the border to travellers for non-essential reasons.
Um, no you're not.
The chances of the Canadian border opening to non essential travel before Fall are virtually zero. And not great even then.
You are going as far as Blaine, WA at most.
You need a Plan B because your chances of crossing the border are slim to none.Edited: 23 April 2021, 12:41
Our Prime Minister has stated that the border will remain closed to non-essential travel until the majority of Canadians have been vaccinated and the timeline for that, is the end of September 2021.
Additionally – there have been vaccine acquisition and distribution problems, creating several delays.
There is very little chance of the border re-opening to tourists this summer.
We did Vancouver to San Francisco - stopped in Cannon Beach and the Redwood forest, both were well worth it. Have also stopped in Ashland, it was ok, Portland/Seattle would normally be good, but not sure how they are doing right now with the protests they seem to be having.
I maybe have a different opinion than others, but it is possible that US government pressure will open the border to fully vaccinated people. At some point it will open right? Will it be before September, it certainly seems unlikely today, where the government doesn't want people to drive to Vancouver Island or the Interior, so why would they open the border? But as more people get vaccinated, it is either going to open up or some other variant will force us to stay home forever.
Three days to get from LA to Tofino...that's a laugh for a start. It takes the better part of one day to get from Vancouver to Tofino, and its two days of hard driving from LA to Vancouver. Border crossing issues aside (and that shuts the whole plan down right there), there's no "stopovers" on this plan to begin with. Its "drive 'til you pass out, pull over and find a place to crash for a few hours, and get up and do it all again." plan, so the question is entirely moot.