I've been catching dozens of 5 inch rock crabs with 2 hotel traps. In the past 2 weeks I've caught about 10 blue claws too, but they were all small. The biggest one had maybe a 3.5 inch shell. There are some out there. In about a month I think it's going to really pick up.
In all the years I have been catching crabs I have never started out crabbin before mid June but this year I am seriously thinking about trying for them in May.