Oh yeah, Robin, when you rode up the Pacific Coast were the headwinds brutal? like, a deal maker or breaker? Keeping in mind I'll be loaded up to the brim and not on a racing bike.

It would be more convenient for me to go from LA to vancouver, but the benefit of doing vancouver to LA is:
prevailing winds come from north to south
wider shoulders on west side of 101
more touring cyclists heading south
better view heading south
not wedged between traffic and a rock wall heading south
I will be able to choose whether to do the trans canada or southern tier route once I get to LA

The cons are:
Pacific northwest weather in june can be sketchy
Pacific southwest weatehr in july can be brutally hot
I will have to take more than one flight (LA to Vancouver ~$110CAD)

Decisions, decisions...