Thanks Ken. As you say, you have to pick the time and know the conditions. Seeing that USCG video sure scared the heck out of me though.
We have a potentially disastrous entrance south of us at Morro Bay. One time I called the Coast Guard before entering (standard procedure at Morro Bay). The reply was "Skipper, clear over the bar and unlimited visibility". When I explained I was outside the entrance and couldn't see the bow of the boat because of the fog, there was a long silence followed by a request for my GPS coordinates. Another long silence before he said "Very clear coordinates, let me know if we can help any further".
This entrance is very small compared with the Columbia River, but it's tough to navigate in fog even in calm conditions if you haven't been there before. It's an S-shaped channel, and it changes because of silting. Fortunately, I'd been in there several times before, so we made a safe entrance. Once inside the harbor it was like someone had lifted a curtain, and it was clear blue sky. Right in front of us was the USCG office. Had the guy looked out the window he would have known we were in thick fog.
After refueling, we tied up at the MBYC guest dock and were joined by a couple of other boats that had left home after us. The folks in the YC explained "you're not going anywehere for several days because the wind is going to shift tonight". When one of our friends said "I've got 1320 hp, he was told "you don't have enough". Sure enough, we wouldn't have got off the dock with a million hp first thing in the morning, although it did switch 180 degrees long enough for us to get out of there.
All around the yacht club were photos of George C Scott's 110 foot boat, vertical, bow down at the entrance. He'd forced his skipper to go against his better judgement, and that was the result. You can't beat local knowledge.