I sail out of Point Roberts, Washington, so I do most of my boating in the same area as you are asking about.
However, the various types of bottom paint have pros and cons (as do most everything to do with boating). Hard paints will give you a little better boat speed, and can be easily "wiped off" prior to a race to gain the best possible boat speed. These hard paints will build up over the years and will have to eventually be removed (stripped off) and you would "start over". Ablative paints tend to slowly "slough off" over time, and are somewhat "soft" compared to hard paints. You may lose a little bit of boat speed compared to hard paint (but the speed loss should be almost neglible). Due to their properties, ablative paints basically "wear off" over time, and therefore do not build up in thickness and if managed properly year to year, you will not have to strip it off. However, if your boat doesn't get much use, then ablative paints are probably not the right one for you, as boat movement is necessary for the paint to "do its best work" keeping the undersea critters off your hull.
When changing from one type of paint to another, you should consult with the paint producer as there can be incompatibilities, and the new paint may not adhere properly. Pre-painting preparation is vital in these cases.
Personally I use Petit Horizons, an ablative paint and have been very happy with it's anti-fouling performance for the last 4 years. If you use an ablative, paint the first coat in one colour, and cover this with one or two coats of a second colour. When you can see the first colour showing through, it is in need of a new paint job.
Hope this helps with your decision,