I agree with most of the above, wont tell which part thu. We love the san jauns in the winter and have been snowed on seveal times in feb and march. it really gets us giggleing because I would swear before a group of c-brats that I was on lake tahoe until the first whale shows up. pine forest, snow and clear water, must be tahoe!! no whale just breached must be san juan!!
As for ramps. the one next to twim bridges is the best for you. Washington parks is a hard one if the wind is blowing out of the north. you would not be able to launch there or retrive with out risking life and limb. Its closer by far but exposed to open water and wind. also goes dam near dry on low tides. I have not used skyline and I think its a sling launch??? also causes you to cross Rosario striat, which can be easy or not doable at all if the wind is against the tide. Try to time your runs across the straits when the wind and tide are going the same direction. We crossed from victoria to Anacortes in a 25mph wind on a big flood tide. the wind was going straight with the tide and we had a smooth ride the whole way with a 3 mph push. That was a fun day.
Day trip ideas, jones island park , cruise near spieden Island to see how many deer and exotic goats you can count, Roche harbor, british camp in garrison bay, sturat island for a hike to the light house, and if you have your passports head over to poets cove resort in bedwell harbour just across Boundary pass on south pender island. Its one of Susans favorite spots, great showers and hot tubs.