I always remember biking down the Oregon coast on the way to past San Fran. Fully loaded, these gusts came wooshing along and pushed me up a little steep bit on some twisty, low guard rail bits with good drops off the sides. I am sure all the panniers front and back made a good sail, but I vividly recall the feeling of being pushed up hardly pedalling. Remember also holding on like heck and keeping my distance from the guardrail in case a weird side gust came up (didnt, but had me worried).

strong head winds are so demoralizing. I'll take a good steep climb over headwinds any day of the week.