I'll post more later but in summary I agree with many of the things Jim said:
1. One night is way too short
2. The weather was not good enough when I first got to Shelter Cove and I, too, diverted to Garberville (later came back to re-attempt)
3. I thought "I didn't give it enough of a chance" and stayed nearby on my second flight to Shelter Cove until conditions improved, but I was several hours earlier than Jim
All in all, I continue to agree with the term "license to learn" and a lot was learned by me on this trip. I said that about my last "big" cross country to a place 2.8 hours away in the 150 but this time (in the 172) was even more epic. So much still to learn but I just don't think I could do it by reading a book. This was a valuable experience and lesson.