Bass XL

Ok heres the deal.. i fish a small walking bridge leading to an island, it is about 25 yards long and it is about 10-20 feet deep with alot of christmas trees and the water is stained. i get most bass jiggin a worm off the bottom, but they arnt the biggist of bass, probably about a pound and a half...any suggestions on what i could use or what presentations i could use to catch the bigger fiah or to catch more fish? thanks