Go For It
The Catalina will do just fine Island hopping, as we call it over on the right coast, . You can jump from one island to the other all the way to South America.
What is meant by a blue water boat is the day in day out, for weeks on end, movement and pounding a boat encounters on a long passage. This constant movement wears on things, then just about when an item is weakened by all the movement, at three A.M. Mother Nature decides to have a little fun with you and throws a squall into your path. You think shoot I have been in worse conditions than this, BANG something breaks, it's dark,raining, the wind is blowing 40 knotts. My friend that is a pucker factor of 8.5