The blue pass lets you sign in a number of guests (number of dependents with a minimum of 3) up to 16 times per year. Make sure to check for blockout dates, especially since the whole summer will essentially be blocked out.
Just bring your pass and ID to the gate of either park and the CM there will ask you how many people you are signing in. The CM will print the tickets there for you.
For complete details on dependents, blockouts, and the like, sign into the Hub and click on "Complimentary Admission" on the right side of the screen under "Quick Access". You can access your main entrance pass usage, comp. tickets, and blockout dates.