Yes, weighing and measuring them will be a good way to go in finding out their condition. Definitely do that.
What would you hope for with this pond? Big bass, big bluegill, or other? Choose one thing as a primary focus and it will make it easier for folks to guide you in achieving it. If it's big LMB, sounds like you might need to start culling some if your "easily" catching them. Print those RW charts and bring them with you. It might help you on the spot in deciding if you should throw any back, or not. Again, that is dependent on what you want to make happen for the pond's future.
